MESON Chess Problem Database
Problem Display
PID: 187583 (4K3/1pp2B2/2pkNBRp/1r4p1/1P2pN2/1nPq4/7Q/2bR4 w - - 0 1)
Kofman, Rafael Moiseevich
Revista Romana de Sah, 1930
#2
10 + 11
| 56 | The Problemist | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Re5
- 2.Be7#
- 1...Re5
- Tries
- 1.Se2+?
- 1...Kd5
- 2.S6d4#
- 2.Sc5#
- 2.Sxg5#
- 2.Sxc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 1...Re5
- 2.Qxe5#
- 1...Bf4!
- 1...Kd5
- 1.Sg2+?
- 1...Kd5
- 2.Sd4#
- 2.Sc5#
- 2.Sxg5#
- 2.Sxc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 1...Re5
- 2.Qxe5#
- 1...Bf4!
- 1...Kd5
- 1.Sxd3+?
- 1...Kd5
- 2.Sd4#
- 2.Sec5#
- 2.Sxg5#
- 2.Sxc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 1...Re5
- 2.Qxe5#
- 1...Bf4!
- 1...Kd5
- 1.Sh3+?
- 1...Kd5
- 2.Sd4#
- 2.Sc5#
- 2.Sexg5#
- 2.Sxc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 1...Re5
- 2.Qxe5#
- 1...Bf4!
- 1...Kd5
- 1.Sh5+?
- 1...Kd5
- 2.Sd4#
- 2.Sc5#
- 2.Sxg5#
- 2.Sxc7#
- 2.Seg7#
- 2.Sd8#
- 2.Sf8#
- 1...Re5
- 2.Qxe5#
- 1...Bf4!
- 1...Kd5
- 1.Sd4?
- threat
- 2.Bg7#
- 2.Bh8#
- 1...Re5+
- 2.Be7#
- 1...Sxd4
- 2.Bxd4#
- 1...Qc4
- 2.Sxb5#
- 2.Sf5#
- 1...Qh3
- 2.Sxb5#
- 2.Sf5#
- 1...Rf5
- 2.Sxf5#
- 1...Sc5
- 2.Sf5#
- 1...e3
- 2.Sd5#
- 1...Rxb4!
- threat
- 1.Sc5?
- threat
- 2.Sxe4#
- 2.Bd4#
- 2.Bg7#
- 2.Bh8#
- 1...Rxb4
- 2.Bd4#
- 1...Rxc5
- 2.Bd4#
- 2.Bg7#
- 2.Bh8#
- 1...Qd4
- 2.Sxe4#
- 2.Bxd4#
- 2.Bg7#
- 2.Bh8#
- 1...Qd5
- 2.Sxe4#
- 2.Bg7#
- 2.Bh8#
- 1...Bd2
- 2.Bd4#
- 2.Bg7#
- 2.Bh8#
- 1...Sd2
- 2.Sfxd3#
- 2.Bd4#
- 2.Bg7#
- 2.Bh8#
- 1...Sd4
- 2.Bxd4#
- 1...e3
- 2.Se2#
- 2.Sg2#
- 2.Sfxd3#
- 2.Sh3#
- 2.Sd5#
- 2.Sh5#
- 2.Se4#
- 2.Bg7#
- 2.Bh8#
- 1...Sxc5!
- threat
- 1.Sd8?
- threat
- 2.Bd4#
- 2.Bg7#
- 2.Bh8#
- 1...Re5+
- 2.Be7#
- 1...Rxb4
- 2.Bd4#
- 1...Qd4
- 2.Bxd4#
- 2.Bg7#
- 2.Bh8#
- 1...Qd5
- 2.Bg7#
- 2.Bh8#
- 1...Rf5
- 2.Sxb7#
- 1...Sd4
- 2.Bxd4#
- 1...e3
- 2.Sd5#
- 2.Bg7#
- 2.Bh8#
- 1...Sc5!
- threat
- 1.Se2+?
- Keys
- 1.Sg7!
- threat
- 2.Bd4#
- 1...Re5+
- 2.Be7#
- 1...Qd4
- 2.Bxd4#
- 1...Qd5
- 2.Sf5#
- 1...Rf5
- 2.Sxf5#
- 1...Sd4
- 2.Bxd4#
- 1...Sc5
- 2.Sf5#
- 1...e3
- 2.Sd5#
- threat
- 1.Sg7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 0
- Sets
- R(e);P_PINS(F),SBLOCK::B(G)
- Tries
- Try
- S(E);CHECK
- Vars
- R(e);N_GUARD,P_PINS(F),P_SPINR(e)::QAB1(B),XR(e)
- Refutation
- B(a);P_SPINB(a)
- Try
- S(E);CHECK
- Vars
- R(e);N_GUARD,P_PINS(F),P_SPINR(e)::QAB1(B),XR(e)
- Refutation
- B(a);P_SPINB(a)
- Try
- S(E);CHECK,XQ(c)
- Vars
- R(e);N_GUARD,P_PINS(F),P_SPINR(e)::QAB1(B),XR(e)
- Refutation
- B(a);P_SPINB(a)
- Try
- S(E);CHECK
- Vars
- R(e);N_GUARD,P_PINS(F),P_SPINR(e)::QAB1(B),XR(e)
- Refutation
- B(a);P_SPINB(a)
- Try
- S(E);CHECK
- Vars
- R(e);N_GUARD,P_PINS(F),P_SPINR(e)::QAB1(B),XR(e)
- Refutation
- B(a);P_SPINB(a)
- Try
- S(F);N_PINQ(c)
- Threat
- DUALS(2)
- Vars
- R(e);CHECK,SBLOCK::R(H)+B(G),DCHECK
- S(b);OGATE,XS(F)::R(H)+B(G),XS(b)
- R(e);N_GUARD::S(F),XR(e)
- S(b);S_CUTR(e)::S(F)
- P(d);S_CUTB(a),S_CUTQ(c)::QAB(B)+S(E)
- Refutation
- R(e);XP(D)
- Try
- S(F);
- Threat
- DUALS(4)
- Vars
- R(e);XP(D)::R(H)+B(G)
- S(b);N_SPINQ(c)::R(H)+B(G),XS(b)
- Refutation
- S(b);XS(F)
- Try
- S(F);
- Threat
- DUALS(3)
- Vars
- R(e);CHECK,SBLOCK::R(H)+B(G),DCHECK
- R(e);XP(D)::R(H)+B(G)
- R(e);N_GUARD::S(F),XP(j)
- S(b);N_SPINQ(c)::R(H)+B(G),XS(b)
- Refutation
- S(b);
- Try
- Actual
- S(F);
- Threat
- R(H)+B(G)
- Vars
- R(e);CHECK,SBLOCK::R(H)+B(G),DCHECK
- Q(c);::R(H)+B(G),XQ(c)
- Q(c);S_CUTR(e)::S(F)
- R(e);N_GUARD::S(F),XR(e)
- S(b);N_SPINQ(c)::R(H)+B(G),XS(b)
- S(b);S_CUTR(e)::S(F)
- P(d);S_CUTB(a)::QAB(B)+S(E)
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