MESON Chess Problem Database
Problem Display
PID: 77908 (1b1NK3/p2pR3/2R1B2n/Qb2k1P1/8/Bp3P2/4N3/1rr5 w - - 0 1)
Zalkind, Lazar Borissovich
2nd Prize, 64 Shakhmatnoe obozrenie, 1925
#2
10 + 9
| 5007 | Zadachi i Etyudi | 1995 |
SOLUTION
- SOUND
- Sets
- 1...Re1
- 2.Qc3#
- 1...Rf1
- 2.Qc3#
- 1...Rg1
- 2.Qc3#
- 1...Rh1
- 2.Qc3#
- 1...Rc3
- 2.Qxc3#
- 1...Bd6
- 2.Bxd6#
- 1...Sg4
- 2.Sf7#
- 1...Sf5
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Sg8
- 2.Sf7#
- 1...d5
- 2.Bh3#
- 2.Bg4#
- 2.Bd7#
- 2.Bc8#
- 1...Re1
- Tries
- 1.Bxc1?
- threat
- 2.Bf4#
- 2.Qc3#
- 1...dxc6
- 2.Bf4#
- 1...dxe6
- 2.Qxb5#
- 1...Sf5
- 2.Sf7#
- 2.Bf4#
- 1...d5
- 2.Bf4#
- 2.Bh3#
- 2.Bg4#
- 2.Bd7#
- 2.Bc8#
- 1...Rxc1!
- threat
- 1.Bb2+?
- 1...Rc3
- 2.Bxc3#
- 2.Qxc3#
- 1...Rxb2!
- 1...Rc3
- 1.Bf5+?
- 1...Kd5
- 2.Be4#
- 1...Kxf5!
- 1...Kd5
- 1.Rxc1?
- threat
- 2.Qc3#
- 1...dxe6+
- 2.Qxb5#
- 1...d5+
- 2.Bd7#
- 1...d6+
- 2.Sc6#
- 1...Sf5
- 2.Sf7#
- 1...Rxc1!
- threat
- 1.Rc4?
- threat
- 2.Re4#
- 2.f4#
- 1...dxe6+
- 2.Qxb5#
- 1...d5+
- 2.Bd7#
- 1...d6+
- 2.Sc6#
- 1...Rf1
- 2.Re4#
- 2.Qc3#
- 1...Rxc4!
- threat
- 1.Rxd7?
- threat
- 2.Rd5#
- 1...Rc5
- 2.Rxc5#
- 1...Bd6
- 2.Bxd6#
- 1...Rd1!
- threat
- 1.Qd2?
- threat
- 2.Bh3#
- 2.Bg4#
- 2.Bxd7#
- 2.Qe3#
- 2.Qf4#
- 2.Qd4#
- 2.Qd5#
- 1...Rxc6
- 2.Qe3#
- 2.Qf4#
- 2.Qd4#
- 2.Qd5#
- 1...Bxe2
- 2.Bh3#
- 2.Bg4#
- 2.Bxd7#
- 2.Qe3#
- 1...Bxc6
- 2.Bh3#
- 2.Bg4#
- 2.Bxd7#
- 2.Qf4#
- 2.Qd4#
- 1...dxc6
- 2.Bh3#
- 2.Bg4#
- 2.Bd7#
- 2.Bc8#
- 2.Qe3#
- 2.Qf4#
- 2.Qd4#
- 1...Rd1
- 2.Bh3#
- 2.Bg4#
- 2.Bxd7#
- 2.Qe3#
- 2.Qf4#
- 1...Rc3
- 2.Bh3#
- 2.Bg4#
- 2.Bxd7#
- 2.Qxc3#
- 2.Qf4#
- 2.Qd4#
- 2.Qd5#
- 1...Rc4
- 2.Bh3#
- 2.Bg4#
- 2.Bxd7#
- 2.Qd5#
- 1...Rc5
- 2.Bh3#
- 2.Bg4#
- 2.Bxd7#
- 2.Qe3#
- 2.Qf4#
- 2.Qd4#
- 1...Bd3
- 2.Qf4#
- 1...Bc4
- 2.Qe3#
- 2.Qf4#
- 2.Qd4#
- 1...Bd6
- 2.Bxd6#
- 2.Qe3#
- 2.Qf4#
- 2.Qd4#
- 2.Qd5#
- 2.Qxd6#
- 1...Sg4
- 2.Sf7#
- 2.Bxg4#
- 2.Bxd7#
- 2.Qf4#
- 2.Qd4#
- 2.Qd5#
- 1...Sf5
- 2.Sf7#
- 2.Qf4#
- 2.Qd5#
- 1...Sg8
- 2.Sf7#
- 2.Qe3#
- 2.Qf4#
- 2.Qd4#
- 2.Qd5#
- 1...d5
- 2.Bh3#
- 2.Bg4#
- 2.Bd7#
- 2.Bc8#
- 2.Qe3#
- 2.Qf4#
- 2.Qd4#
- 2.Qxd5#
- 1...d6
- 2.Bh3#
- 2.Bg4#
- 2.Bd7#
- 2.Bc8#
- 2.Qe3#
- 2.Qf4#
- 2.Qd4#
- 2.Qd5#
- 1...dxe6!
- threat
- 1.Qc7+?
- 1...d6
- 2.Bxd6#
- 1...Bxc7!
- 1...d6
- 1.Qxb5+?
- 1...d5
- 2.Bh3#
- 2.Bg4#
- 2.Bd7#
- 2.Bc8#
- 2.Qxd5#
- 2.Qxb8#
- 1...Rc5!
- 1...d5
- 1.Bxc1?
- Keys
- 1.Rc3!
- threat
- 2.Re3#
- 1...dxe6+
- 2.Qxb5#
- 1...d5+
- 2.Bd7#
- 1...d6+
- 2.Sc6#
- 1...Rxc3
- 2.Qxc3#
- 1...Sg4
- 2.Sf7#
- 1...Sf5
- 2.Sf7#
- threat
- 1.Rc3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 7
- Sets
- R(b);N_GUARD::QAB(D)
- R(b);N_GUARD::QAB(D),XR(b)
- B(i);N_GUARD::B(B),XB(i)
- S(f);N_GUARD::S(I)
- S(f);N_GUARD::S(I),XS(f)
- Tries
- Try
- B(B);XR(b)
- Threat
- DUALS(2)
- Vars
- P(h);XR(F)::B(B)
- P(h);N_GUARD,P_PINR(F),P_SPINP(h),XB(G)::QAR(D),XB(d)
- Refutation
- R(a);XB(B)
- Try
- B(B);CHECK
- Refutation
- R(a);XB(B)
- Try
- B(G);CHECK
- Vars
- K(e);P-FLIGHT::B(G)
- Refutation
- K(e);P-FLIGHT,XB(G)
- Try
- R(F);XR(b)
- Threat
- QAB(D)
- Vars
- P(h);CHECK,N_GUARD,P_SPINP(h),XB(G)::QAR(D),XB(d)
- P(h);CHECK,N_SPINB(d),SBLOCK::R(H)+B(G)
- P(h);CHECK,N_GUARD::S(I)
- S(f);N_GUARD::S(I)
- Refutation
- R(a);XR(F)
- Try
- R(F);
- Threat
- DUALS(2)
- Vars
- P(h);CHECK,N_GUARD,P_SPINP(h),XB(G)::QAR(D),XB(d)
- P(h);CHECK,N_SPINB(d),SBLOCK::R(H)+B(G)
- P(h);CHECK,N_GUARD::S(I)
- Refutation
- R(b);XR(F)
- Try
- R(H);XP(h)
- Threat
- R1(H)
- Vars
- R(b);N_GUARD,N_SPINB(d)::R(F),XR(b)
- B(i);N_GUARD::B(B),XB(i)
- Refutation
- R(b);
- Try
- Q(D);N_PINB(d)
- Threat
- DUALS(7)
- Vars
- B(d);::QAB1(D)
- Refutation
- P(h);P_PINR(F),P_SPINP(h),XB(G)
- Try
- Q(D);CHECK,N_PINB(d)
- Vars
- P(h);P_PINR(F),P_SPINP(h)::B(B),XP(h)
- Refutation
- B(i);XQ(D)
- Try
- Q(D);CHECK,XB(d)
- Refutation
- R(b);P_SPINR(b)
- Try
- Actual
- R(F);
- Threat
- R(F)
- Vars
- P(h);CHECK,N_GUARD,P_SPINP(h),XB(G)::QAR(D),XB(d)
- P(h);CHECK,N_SPINB(d),SBLOCK::R(H)+B(G)
- P(h);CHECK,N_GUARD::S(I)
- R(b);OGATE,XR(F)::QAB(D),XR(b)
- S(f);N_GUARD::S(I)
Developed and maintained by Brian Stephenson.
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