MESON Chess Problem Database
Problem Display
PID: 60891 (7Q/3n1P1P/4prP1/4N3/5k1N/3R1B1K/5B2/8 w - - 0 1)
Kahane, Ernest
1st HM., Bulletin de la FFE, 1928
#2
10 + 4
SOLUTION
- SOUND
- Sets
- 1...Kxe5
- 2.Bg3#
- 1...Rf5
- 2.Be3#
- 1...Rxg6
- 2.Be3#
- 1...Rxf7
- 2.Be3#
- 1...Sc5
- 2.Qxf6#
- 1...Sxe5
- 2.Be3#
- 2.Qxf6#
- 1...Sb6
- 2.Qxf6#
- 1...Sb8
- 2.Qxf6#
- 1...Sf8
- 2.Qxf6#
- 1...Kxe5
- Tries
- 1.Kh2?
- 1...Kxe5
- 2.Bg3#
- 1...Rxg6
- 2.Be3#
- 1...Rxf7
- 2.Be3#
- 1...Sxe5
- 2.Be3#
- 2.Qxf6#
- 1...Rf5
- 2.Be3#
- 1...Sc5
- 2.Qxf6#
- 1...Sb6
- 2.Qxf6#
- 1...Sb8
- 2.Qxf6#
- 1...Sf8
- 2.Qxf6#
- 1...Kg5!
- 1...Kxe5
- 1.Sxd7?
- threat
- 2.Be3#
- 2.Qxf6#
- 1...Rxg6
- 2.Be3#
- 2.Qe5#
- 1...Rxf7
- 2.Be3#
- 2.Qe5#
- 1...Rf5
- 2.Be3#
- 1...Kg5!
- threat
- 1.Be1?
- 1...Kxe5
- 2.Bg3#
- 1...Rxg6
- 2.Bd2#
- 1...Rxf7
- 2.Bd2#
- 1...Sxe5
- 2.Bd2#
- 2.Qxf6#
- 1...Rf5
- 2.Bd2#
- 1...Sc5
- 2.Qxf6#
- 1...Sb6
- 2.Qxf6#
- 1...Sb8
- 2.Qxf6#
- 1...Sf8
- 2.Qxf6#
- 1...Kg5!
- 1...Kxe5
- 1.Bg1?
- 1...Kxe5
- 2.Bh2#
- 1...Rxg6
- 2.Be3#
- 1...Rxf7
- 2.Be3#
- 1...Sxe5
- 2.Be3#
- 2.Qxf6#
- 1...Rf5
- 2.Be3#
- 1...Sc5
- 2.Qxf6#
- 1...Sb6
- 2.Qxf6#
- 1...Sb8
- 2.Qxf6#
- 1...Sf8
- 2.Qxf6#
- 1...Kg5!
- 1...Kxe5
- 1.Bd4?
- 1...Rxg6
- 2.Be3#
- 1...Rxf7
- 2.Be3#
- 1...Sxe5
- 2.Be3#
- 2.Qxf6#
- 1...Rf5
- 2.Be3#
- 1...Sc5
- 2.Qxf6#
- 1...Sb6
- 2.Qxf6#
- 1...Sb8
- 2.Qxf6#
- 1...Sf8
- 2.Qxf6#
- 1...Kg5!
- 1...Rxg6
- 1.Bc5?
- 1...Kxe5
- 2.Bd6#
- 1...Rxg6
- 2.Be3#
- 1...Rxf7
- 2.Be3#
- 1...Sxc5
- 2.Qxf6#
- 1...Sxe5
- 2.Be3#
- 2.Qxf6#
- 1...Rf5
- 2.Be3#
- 1...Sb6
- 2.Qxf6#
- 1...Sb8
- 2.Qxf6#
- 1...Sf8
- 2.Qxf6#
- 1...Kg5!
- 1...Kxe5
- 1.Bb6?
- 1...Kxe5
- 2.Bc7#
- 1...Rxg6
- 2.Be3#
- 1...Rxf7
- 2.Be3#
- 1...Sxe5
- 2.Be3#
- 2.Qxf6#
- 1...Sxb6
- 2.Qxf6#
- 1...Rf5
- 2.Be3#
- 1...Sc5
- 2.Qxf6#
- 1...Sb8
- 2.Qxf6#
- 1...Sf8
- 2.Qxf6#
- 1...Kg5!
- 1...Kxe5
- 1.Bh1?
- 1...Kxe5
- 2.Bg3#
- 1...Rxg6
- 2.Be3#
- 1...Rxf7
- 2.Be3#
- 1...Sxe5
- 2.Be3#
- 2.Qxf6#
- 1...Rf5
- 2.Be3#
- 1...Sc5
- 2.Qxf6#
- 1...Sb6
- 2.Qxf6#
- 1...Sb8
- 2.Qxf6#
- 1...Sf8
- 2.Qxf6#
- 1...Kg5!
- 1...Kxe5
- 1.Bg2?
- 1...Kxe5
- 2.Bg3#
- 1...Rxg6
- 2.Be3#
- 1...Rxf7
- 2.Be3#
- 1...Sxe5
- 2.Be3#
- 2.Qxf6#
- 1...Rf5
- 2.Be3#
- 1...Sc5
- 2.Qxf6#
- 1...Sb6
- 2.Qxf6#
- 1...Sb8
- 2.Qxf6#
- 1...Sf8
- 2.Qxf6#
- 1...Kg5!
- 1...Kxe5
- 1.Bc6?
- 1...Kxe5
- 2.Bg3#
- 1...Rxg6
- 2.Be3#
- 1...Rxf7
- 2.Be3#
- 1...Sxe5
- 2.Be3#
- 2.Qxf6#
- 1...Rf5
- 2.Be3#
- 1...Sc5
- 2.Qxf6#
- 1...Sb6
- 2.Qxf6#
- 1...Sb8
- 2.Qxf6#
- 1...Sf8
- 2.Qxf6#
- 1...Kg5!
- 1...Kxe5
- 1.Bb7?
- 1...Kxe5
- 2.Bg3#
- 1...Rxg6
- 2.Be3#
- 1...Rxf7
- 2.Be3#
- 1...Sxe5
- 2.Be3#
- 2.Qxf6#
- 1...Rf5
- 2.Be3#
- 1...Sc5
- 2.Qxf6#
- 1...Sb6
- 2.Qxf6#
- 1...Sb8
- 2.Qxf6#
- 1...Sf8
- 2.Qxf6#
- 1...Kg5!
- 1...Kxe5
- 1.Ba8?
- 1...Kxe5
- 2.Bg3#
- 1...Rxg6
- 2.Be3#
- 1...Rxf7
- 2.Be3#
- 1...Sxe5
- 2.Be3#
- 2.Qxf6#
- 1...Rf5
- 2.Be3#
- 1...Sc5
- 2.Qxf6#
- 1...Sb6
- 2.Qxf6#
- 1...Sb8
- 2.Qxf6#
- 1...Sf8
- 2.Qxf6#
- 1...Kg5!
- 1...Kxe5
- 1.Qg7?
- 1...Kxe5
- 2.Bg3#
- 1...Rxg6
- 2.Be3#
- 1...Rxf7
- 2.Be3#
- 1...Sxe5
- 2.Be3#
- 2.Qxf6#
- 2.Qh6#
- 1...Rf5
- 2.Be3#
- 1...Sc5
- 2.Qxf6#
- 1...Sb6
- 2.Qxf6#
- 1...Sb8
- 2.Qxf6#
- 1...Sf8
- 2.Qxf6#
- 1...Kg5!
- 1...Kxe5
- 1.f8Q?
- 1...Kxe5
- 2.Bg3#
- 2.Qd6#
- 1...Rxf8
- 2.Be3#
- 1...Sxe5
- 2.Be3#
- 2.Qh6#
- 2.Qhxf6#
- 2.Qfxf6#
- 1...Sxf8
- 2.Qxf6#
- 1...Rf5
- 2.Be3#
- 1...Rf7
- 2.Be3#
- 2.Qh6#
- 1...Sc5
- 2.Qhxf6#
- 2.Qfxf6#
- 1...Sb6
- 2.Qhxf6#
- 2.Qfxf6#
- 1...Sb8
- 2.Qhxf6#
- 2.Qfxf6#
- 1...Kg5!
- 1...Kxe5
- 1.f8S?
- 1...Kxe5
- 2.Bg3#
- 1...Rxg6
- 2.Be3#
- 1...Rxf8
- 2.Be3#
- 1...Sxe5
- 2.Be3#
- 2.Qxf6#
- 1...Sxf8
- 2.Qxf6#
- 1...Rf5
- 2.Sxe6#
- 2.Be3#
- 1...Rf7
- 2.Sxe6#
- 2.Be3#
- 1...Sc5
- 2.Qxf6#
- 1...Sb6
- 2.Qxf6#
- 1...Sb8
- 2.Qxf6#
- 1...Kg5!
- 1...Kxe5
- 1.f8B?
- 1...Kxe5
- 2.Bg3#
- 2.Bd6#
- 1...Rxg6
- 2.Be3#
- 1...Rxf8
- 2.Be3#
- 1...Sxe5
- 2.Be3#
- 2.Bh6#
- 2.Qxf6#
- 1...Sxf8
- 2.Qxf6#
- 1...Rf5
- 2.Be3#
- 1...Rf7
- 2.Be3#
- 2.Bh6#
- 1...Sc5
- 2.Qxf6#
- 1...Sb6
- 2.Qxf6#
- 1...Sb8
- 2.Qxf6#
- 1...Kg5!
- 1...Kxe5
- 1.f8R?
- 1...Kxe5
- 2.Bg3#
- 1...Rxf8
- 2.Be3#
- 1...Sxe5
- 2.Be3#
- 2.Qxf6#
- 1...Sxf8
- 2.Qxf6#
- 1...Rf5
- 2.Be3#
- 1...Rf7
- 2.Be3#
- 1...Sc5
- 2.Qxf6#
- 1...Sb6
- 2.Qxf6#
- 1...Sb8
- 2.Qxf6#
- 1...Kg5!
- 1...Kxe5
- 1.Kh2?
- Keys
- 1.Qd8!
- 1...Kxe5
- 2.Qc7#
- 1...Kg5
- 2.Be3#
- 1...Rxg6
- 2.Sexg6#
- 1...Rxf7
- 2.Bg3#
- 1...Sxe5
- 2.Be3#
- 2.Qxf6#
- 1...Rf5
- 2.Bg3#
- 1...Sc5
- 2.Qxf6#
- 1...Sb6
- 2.Qxf6#
- 1...Sb8
- 2.Qxf6#
- 1...Sf8
- 2.Qxf6#
- 1...Kxe5
- 1.Qd8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 4
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- K(a);P_SPINR(c),S_FLIGHT,XS(F)::B(A)
- R(c);::B(A)
- R(c);XP(G)::B(A)
- R(c);XP(H)::B(A)
- S(d);N_GUARD::QAR2(J),XR(c)
- Tries
- Try
- K(D);P-FLIGHT
- Vars
- K(a);P_SPINR(c),S_FLIGHT,XS(F)::B(A)
- R(c);XP(G)::B(A)
- R(c);XP(H)::B(A)
- R(c);::B(A)
- S(d);N_GUARD::QAR2(J),XR(c)
- Refutation
- K(a);S_FLIGHT
- Try
- S(F);XS(d)
- Threat
- DUALS(2)
- Vars
- R(c);::B(A)
- Refutation
- K(a);S_FLIGHT
- Try
- B(A);
- Vars
- K(a);P_SPINR(c),S_FLIGHT,XS(F)::B(A)
- R(c);XP(G)::B(A)
- R(c);XP(H)::B(A)
- R(c);::B(A)
- S(d);N_GUARD::QAR2(J),XR(c)
- Refutation
- K(a);S_FLIGHT
- Try
- B(A);
- Vars
- K(a);P_SPINR(c),S_FLIGHT,XS(F)::B(A)
- R(c);XP(G)::B(A)
- R(c);XP(H)::B(A)
- R(c);::B(A)
- S(d);N_GUARD::QAR2(J),XR(c)
- Refutation
- K(a);S_FLIGHT
- Try
- B(A);
- Vars
- R(c);XP(G)::B(A)
- R(c);XP(H)::B(A)
- R(c);::B(A)
- S(d);N_GUARD::QAR2(J),XR(c)
- Refutation
- K(a);S_FLIGHT
- Try
- B(A);
- Vars
- K(a);OGATEB,P_SPINR(c),S_FLIGHT,XS(F)::B(A)
- R(c);XP(G)::B(A)
- R(c);XP(H)::B(A)
- S(d);N_GUARD,XB(A)::QAR2(J),XR(c)
- R(c);::B(A)
- S(d);N_GUARD::QAR2(J),XR(c)
- Refutation
- K(a);S_FLIGHT
- Try
- B(A);
- Vars
- K(a);OGATEB,P_SPINR(c),S_FLIGHT,XS(F)::B(A)
- R(c);XP(G)::B(A)
- R(c);XP(H)::B(A)
- S(d);N_GUARD,XB(A)::QAR2(J),XR(c)
- R(c);::B(A)
- S(d);N_GUARD::QAR2(J),XR(c)
- Refutation
- K(a);S_FLIGHT
- Try
- B(C);
- Vars
- K(a);P_SPINR(c),S_FLIGHT,XS(F)::B(A)
- R(c);XP(G)::B(A)
- R(c);XP(H)::B(A)
- R(c);::B(A)
- S(d);N_GUARD::QAR2(J),XR(c)
- Refutation
- K(a);S_FLIGHT
- Try
- B(C);
- Vars
- K(a);P_SPINR(c),S_FLIGHT,XS(F)::B(A)
- R(c);XP(G)::B(A)
- R(c);XP(H)::B(A)
- R(c);::B(A)
- S(d);N_GUARD::QAR2(J),XR(c)
- Refutation
- K(a);S_FLIGHT
- Try
- B(C);
- Vars
- K(a);P_SPINR(c),S_FLIGHT,XS(F)::B(A)
- R(c);XP(G)::B(A)
- R(c);XP(H)::B(A)
- R(c);::B(A)
- S(d);N_GUARD::QAR2(J),XR(c)
- Refutation
- K(a);S_FLIGHT
- Try
- B(C);
- Vars
- K(a);P_SPINR(c),S_FLIGHT,XS(F)::B(A)
- R(c);XP(G)::B(A)
- R(c);XP(H)::B(A)
- R(c);::B(A)
- S(d);N_GUARD::QAR2(J),XR(c)
- Refutation
- K(a);S_FLIGHT
- Try
- B(C);
- Vars
- K(a);P_SPINR(c),S_FLIGHT,XS(F)::B(A)
- R(c);XP(G)::B(A)
- R(c);XP(H)::B(A)
- R(c);::B(A)
- S(d);N_GUARD::QAR2(J),XR(c)
- Refutation
- K(a);S_FLIGHT
- Try
- Q(J);
- Vars
- K(a);P_SPINR(c),S_FLIGHT,XS(F)::B(A)
- R(c);XP(G)::B(A)
- R(c);XP(H)::B(A)
- R(c);::B(A)
- S(d);N_GUARD::QAR2(J),XR(c)
- Refutation
- K(a);S_FLIGHT
- Try
- P(H);P_PINR(c)
- Vars
- R(c);N_SPINR(c),XQ(H)::B(A)
- S(d);N_GUARD,N_SPINR(c),XQ(H)::QAR2(J),XR(c)
- R(c);::B(A)
- Refutation
- K(a);N_SPINR(c),S_FLIGHT
- Try
- P(H);
- Vars
- K(a);P_SPINR(c),S_FLIGHT,XS(F)::B(A)
- R(c);XP(G)::B(A)
- R(c);XS(H)::B(A)
- S(d);N_GUARD,XS(H)::QAR2(J),XR(c)
- S(d);N_GUARD::QAR2(J),XR(c)
- Refutation
- K(a);S_FLIGHT
- Try
- P(H);
- Vars
- R(c);XP(G)::B(A)
- R(c);XB(H)::B(A)
- S(d);N_GUARD,XB(H)::QAR2(J),XR(c)
- R(c);::B(A)
- S(d);N_GUARD::QAR2(J),XR(c)
- Refutation
- K(a);S_FLIGHT
- Try
- P(H);P_PINR(c)
- Vars
- K(a);S_FLIGHT,XS(F)::B(A)
- R(c);N_SPINR(c),XR(H)::B(A)
- S(d);N_GUARD,N_SPINR(c),XR(H)::QAR2(J),XR(c)
- R(c);::B(A)
- S(d);N_GUARD::QAR2(J),XR(c)
- Refutation
- K(a);N_SPINR(c),S_FLIGHT
- Try
- Actual
- Q(J);
- Vars
- K(a);OGATEB,S_FLIGHT,XS(F)::QAB(J)
- K(a);P_SPINR(c),S_FLIGHT::B(A)
- R(c);XP(G)::S(F),XR(c)
- R(c);XP(H)::B(A)
- R(c);::B(A)
- S(d);N_GUARD::QAR2(J),XR(c)
Developed and maintained by Brian Stephenson.
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