MESON Chess Problem Database
Problem Display
PID: 53503 (2Qb3B/1p2P3/1rnN3K/3k4/1p1pN3/1P1n4/6B1/8 w - - 0 1)
Jacobs, Walter William
The Chess Review, 1934
#2
8 + 8
SOLUTION
- SOUND
- Sets
- 1...Bc7
- 2.Qg8#
- 1...Bxe7
- 2.Qg8#
- 1...Sa7
- 2.Qc4#
- 1...Sxe7
- 2.Qc4#
- 1...Sb8
- 2.Qc4#
- 1...Bc7
- Tries
- 1.Sc3+?
- 1...Kc5
- 2.Sde4#
- 1...Kxd6!
- 1...Kc5
- 1.Sc4?
- threat
- 2.Qd7#
- 1...Sa5+
- 2.Sed6#
- 2.Sf6#
- 1...Sce5+
- 2.Sf6#
- 1...Sa7+
- 2.Sed6#
- 2.Sf6#
- 1...Sxe7+
- 2.Sed6#
- 2.Sf6#
- 1...Sb8+
- 2.Sed6#
- 2.Sf6#
- 1...Bxe7
- 2.Sxb6#
- 2.Qg8#
- 1...Bc7
- 2.Qg8#
- 1...Sc5
- 2.Sc3#
- 2.Sf6#
- 1...Sde5!
- threat
- 1.Sb5?
- threat
- 2.Qd7#
- 1...Sa5+
- 2.Sed6#
- 1...Sce5+
- 2.Sf6#
- 1...Sa7+
- 2.Sed6#
- 1...Sxe7+
- 2.Sed6#
- 1...Sb8+
- 2.Sed6#
- 1...Bxe7
- 2.Sc7#
- 2.Qg8#
- 1...Bc7
- 2.Sxc7#
- 2.Qg8#
- 1...Sc5
- 2.Sec3#
- 1...Sde5!
- threat
- 1.Sf5?
- threat
- 2.Qd7#
- 1...Sa5+
- 2.Sed6#
- 1...Sce5+
- 2.Sf6#
- 1...Sa7+
- 2.Sed6#
- 1...Sxe7+
- 2.Sed6#
- 1...Sb8+
- 2.Sed6#
- 1...Bxe7
- 2.Qg8#
- 1...Bc7
- 2.Qg8#
- 1...Sc5
- 2.Sc3#
- 1...Sde5!
- threat
- 1.Sxb7?
- threat
- 2.Sd2#
- 2.Sf2#
- 2.Sc3#
- 2.Sg3#
- 2.Sec5#
- 2.Sg5#
- 2.Sed6#
- 2.Qd7#
- 1...Sa5+
- 2.Sed6#
- 1...Sce5+
- 2.Sf6#
- 1...Sa7+
- 2.Sed6#
- 1...Sxe7+
- 2.Sed6#
- 1...Sb8+
- 2.Sed6#
- 1...Bxe7
- 2.Sd2#
- 2.Sf2#
- 2.Sc3#
- 2.Sg3#
- 2.Sec5#
- 2.Sg5#
- 2.Sed6#
- 2.Qg8#
- 1...Bc7
- 2.Sd2#
- 2.Sf2#
- 2.Sc3#
- 2.Sg3#
- 2.Sec5#
- 2.Sg5#
- 2.Sed6#
- 2.Qg8#
- 1...Se1
- 2.Sc3#
- 2.Qd7#
- 1...Sf2
- 2.Sxf2#
- 2.Sc3#
- 2.Qd7#
- 1...Sf4
- 2.Sc3#
- 2.Qd7#
- 1...Sc5
- 2.Sc3#
- 2.Sexc5#
- 1...Sde5
- 2.Sc3#
- 2.Sf6#
- 1...Rxb7!
- threat
- 1.Sc3+?
- Keys
- 1.Se8!
- threat
- 2.Qd7#
- 1...Sa5+
- 2.S4d6#
- 1...Sce5+
- 2.S4f6#
- 1...Sa7+
- 2.S4d6#
- 1...Sxe7+
- 2.S4d6#
- 1...Sb8+
- 2.S4d6#
- 1...Bxe7
- 2.Sc7#
- 1...Bc7
- 2.Sxc7#
- 1...Sc5
- 2.Sc3#
- 1...Sde5
- 2.S8f6#
- threat
- 1.Se8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 5
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- B(h);OGATE::QAB(G)
- B(h);OGATE,XP(F)::QAB(G)
- S(f);OGATE,P_PINS(D)::QAB1(G)
- S(f);OGATE,P_PINS(D),XP(F)::QAB1(G)
- Tries
- Try
- S(C);CHECK
- Vars
- K(d);P-FLIGHT,P_SPINS(f)::S(D)
- Refutation
- K(d);P-FLIGHT,XS(D)
- Try
- S(D);
- Threat
- QAR2(G)
- Vars
- S(f);CHECK::B(A)+S(C),DCHECK
- B(h);OGATE::QAB(G)
- Refutation
- S(a);
- Try
- S(D);
- Threat
- QAR2(G)
- Vars
- S(f);CHECK::B(A)+S(C)
- S(f);CHECK,SBLOCK::B(A)+S(C),DCHECK
- S(f);CHECK,XP(F)::B(A)+S(C)
- S(a);SBLOCK::B(A)+S(C),DCHECK
- Refutation
- S(a);
- Try
- S(D);
- Threat
- QAR2(G)
- Vars
- S(f);CHECK::B(A)+S(C)
- S(f);CHECK,SBLOCK::B(A)+S(C),DCHECK
- S(f);CHECK,XP(F)::B(A)+S(C)
- B(h);OGATE,XP(F)::QAB(G)
- B(h);OGATE::QAB(G)
- S(a);SBLOCK::B(A)+S(C),DCHECK
- Refutation
- S(a);
- Try
- S(D);XP(g)
- Threat
- DUALS(8)
- Vars
- S(f);CHECK::B(A)+S(C)
- S(f);CHECK,SBLOCK::B(A)+S(C),DCHECK
- S(f);CHECK,XP(F)::B(A)+S(C)
- Refutation
- R(e);XS(D)
- Try
- Actual
- S(D);
- Threat
- QAR2(G)
- Vars
- S(f);CHECK::B(A)+S(C)
- S(f);CHECK,SBLOCK::B(A)+S(C),DCHECK
- S(f);CHECK,XP(F)::B(A)+S(C)
- B(h);N_GUARD,XP(F)::S(D)
- B(h);N_GUARD::S(D),XB(h)
- S(a);SBLOCK::B(A)+S(C),DCHECK
- S(a);SBLOCK::S(D)
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