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Up Topic The Rybka Lounge / Computer Chess / N-odds: Stockfish (but not Classic) plays ABSURD gambits?!
- By MrKris (****) Date 2021-07-06 00:35
Ten minutes PV=4 example. Stockfish (defaults) makes in 3 of the 4 ABSURD gambits! :
N odds, remove white's N(b1):
rnbqkb1r/pppppppp/5n2/8/8/5N2/PPPPPPPP/R1BQKB1R w KQkq - 2 2

Stockfish_21070310: PV=4 Best at bottom  (R7 2700X)-------------------------------
34/44  10:14    8,472,724k  13,790k  -8.07  2.c3 d5 3.d4 e6 4.e4-?? dxe4 5.Ne5...
34/47  10:14    8,472,724k  13,790k  -8.00  2.e3 d5 3.d4 e6 4.Bd3...
34/44  10:14    8,472,724k  13,790k  -7.84  2.d4 d5 3.e4-?? dxe4 4.Ne5...
34/44  10:14    8,472,724k  13,790k  -7.38  2.e4-?? Nxe4 3.d4 d5 4.Bd3...


See my 2 posts:

-- Stockfish gives N odds to engines {default with NNUE}
http://rybkaforum.net/cgi-bin/rybkaforum/topic_show.pl?tid=33948

-- StockfishClassic +122 Elo better at N-odds than Stockfish 14
http://rybkaforum.net/cgi-bin/rybkaforum/topic_show.pl?tid=33953
{Classic: Use NNUE = false, unchecked}

Same TC, openings, same order - as in the game #'s below. Examples have N(b1) & N(g1) removed.
(There are many more examples but, without checking, have many repeates.)

game # Stockfish result and move ; game # SfClassic result and move:

Ex. 1 -- #2 Sf 0-1 Cicada 2.e4?? Nxe4 ; #2 SfCl 1-0 Cicada 2.e3
rnbqkb1r/pppppppp/5n2/8/8/5N2/PPPPPPPP/R1BQKB1R w KQkq - 2 2


Ex. 2 -- #15 Sf 0-1 Achillees --see Ex. 4-- ; (#15 SfCl 1-0 Achillees 1.d4)

Ex. 3 -- #17 Sf 0-1 Achillees 2.e4?? ; #17 SfCl 1-0 Achillees 2.Bf4
rnbqkbnr/ppp1pppp/8/3p4/3P4/8/PPP1PPPP/R1BQKBNR w KQkq d6 0 2


Ex. 4 -- #18 Sf 0-1 Achillees 3.d4?! exd4 4.Bc4?! Nf6 5.O-O?! Nxe4 6.Bd5?! ; #18 SfCl 1-0 Achillees 3.Bb5
?! = very risky with N-odds, note SfClassic won instead of lost with a safer move.
r1bqkbnr/pppp1ppp/2n5/4p3/4P3/5N2/PPPP1PPP/R1BQKB1R w KQkq - 2 3


Ex. 5 -- #27 Sf 0-1 Achillees 3.e4?? ; #27 SfCl 1-0 Achillees 3.Bf4
rnbqkb1r/ppp1pppp/5n2/3p4/3P4/2N5/PPP1PPPP/R1BQKB1R w KQkq - 1 3


Ex. 6 -- #28 Sf 0-1 Achillees 2.e4?? ; #28 SfCl 1-0 Achillees 2.d4
rnbqkbnr/ppp1pppp/8/3p4/8/2P5/PP1PPPPP/RNBQKB1R w KQkq d6 0 2


Ex. 7 -- #37 Sf 0-1 aice 2.e4?? dxe4 3.Be2?! e5! ; #37 SfCl 1-0 aice 2.c4 e5!? (gambits become very interesting for the odds receiver!)
rnbqkbnr/ppp1pppp/8/3p4/3P4/8/PPP1PPPP/RNBQKB1R w KQkq d6 0 2


Ex. 8 -- #42 Sf 0-1 aice 4.e4?? ; #42 SfCl 1-0 aice 4.Bg5
rnbqkb1r/pppp1ppp/5n2/8/3P4/8/PP2PPPP/RNBQKB1R w KQkq - 1 4


Ex. 9 -- #47 Sf 0-1 Loki 2.Be2?! Nf6 3.e4?? ; #47 SfCl 1/2-1/2 Loki 2.d4
rnbqkbnr/pppp1ppp/8/4p3/8/4P3/PPPP1PPP/R1BQKBNR w KQkq e6 0 2


Ex. 10 -- #50 Sf 0-1 Loki 1.e4 e5 2.d4!? exd4 3.Bc4 ; #50 SfCl 1-0 Loki 1.d4 d5 2.c4 e6 3.Nc3
Stockfish very risky with N-odds, SfClassic won not lost with safer moves.
rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKB1R w KQkq - 0 1


Ex. 11 -- #54 Sf 0-1 Loki 2.e4?? ; #54 SfCl 1-0 Loki 2.d4
rnbqkb1r/pppppppp/5n2/8/8/4P3/PPPP1PPP/RNBQKB1R w KQkq - 1 2


Ex. 12 -- #56 Sf 0-1 Loki 2.e4?? ; #56 SfCl 1-0 Loki 2.d4
rnbqkb1r/pppppppp/5n2/8/8/2P5/PP1PPPPP/RNBQKB1R w KQkq - 1 2


Ex. 13 -- #58 Sf 0-1 K2 2.e4?? ; #58 SfCl 1-0 K2 2.b3
rnbqkb1r/pppppppp/5n2/8/8/1P3N2/P1PPPPPP/R1BQKB1R b KQkq - 0 2


Ex. 14 -- #59 Sf 0-1 K2 2.e4?? ; #59 SfCl 1-0 K2 2.c4
rnbqkb1r/pppppppp/5n2/8/3P4/8/PPP1PPPP/R1BQKBNR w KQkq - 1 2
Up Topic The Rybka Lounge / Computer Chess / N-odds: Stockfish (but not Classic) plays ABSURD gambits?!

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