MESON Chess Problem Database
Problem Display
PID: 265955 (1R1R2Bn/N2b1p2/1Q4p1/3kn1K1/5P2/5p2/1P1N1P2/8 w - - 0 1)
Sammelius, Carel Johan Robert
Schakend Nederland, 1987
#2
10 + 7
| 15601 | Albrecht-Leiss-Degener Collection | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Sd3
- 2.Rxd7#
- 1...Sg4
- 2.Rxd7#
- 1...Sd3
- Tries
- 1.Sb5?
- threat
- 2.Sc3#
- 2.Sc7#
- 2.Qd6#
- 1...Sc4
- 2.Sc3#
- 2.Sc7#
- 1...Sc6!
- threat
- 1.Sc8?
- threat
- 2.Se7#
- 2.Qd6#
- 1...Sc4
- 2.Se7#
- 1...Sc6!
- threat
- 1.Qe3?
- threat
- 2.Qxe5#
- 1...Kd6
- 2.Qxe5#
- 1...Ke6
- 2.Qxe5#
- 1...Sd3
- 2.Rxd7#
- 1...Sg4
- 2.Rxd7#
- 1...Sc6
- 2.Rxd7#
- 1...Sc4!
- threat
- 1.Qd4+?
- 1...Ke6
- 2.Qxe5#
- 1...Kxd4!
- 1...Ke6
- 1.Qa5+?
- 1...Kd6
- 2.Qxe5#
- 1...Ke6
- 2.Qxe5#
- 1...Kd4!
- 1...Kd6
- 1.Qc5+?
- 1...Ke6
- 2.Qxe5#
- 1...Kxc5!
- 1...Ke6
- 1.Qb5+?
- 1...Kd6
- 2.Qxe5#
- 1...Ke6
- 2.Qxe5#
- 1...Kd4!
- 1...Kd6
- 1.Qc6+?
- 1...Kd4
- 2.Qd6#
- 1...Sxc6!
- 1...Kd4
- 1.Qf6?
- threat
- 2.Qxe5#
- 1...Kd4
- 2.Qd6#
- 1...Kc5
- 2.Qxe5#
- 1...Sc4
- 2.Rb5#
- 1...Sg4
- 2.Rb5#
- 1...Sc6
- 2.Rb5#
- 1...Sd3!
- threat
- 1.b3?
- 1...Sc4
- 2.bxc4#
- 1...Sd3
- 2.Rxd7#
- 1...Sg4
- 2.Rxd7#
- 1...Sc6!
- 1...Sc4
- 1.Sb5?
- Keys
- 1.Sb3!
- 1...Kc4
- 2.Qd4#
- 1...Ke4
- 2.Qd4#
- 1...Sc6
- 2.Qxc6#
- 1...Sd3
- 2.Qc6#
- 1...Sc4
- 2.Qc6#
- 1...Sg4
- 2.Qc6#
- 1...Kc4
- 1.Sb3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 2
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- S(c);N_GUARD::R(I),XB(e)
- Tries
- Try
- S(G);
- Threat
- DUALS(3)
- Refutation
- S(c);
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- S(c);::S(G)
- Refutation
- S(c);
- Try
- Q(F);
- Threat
- QAR1(F),XS(c)
- Vars
- K(b);N_SPINP(f),P-FLIGHT::QAB1(F),XS(c)
- K(b);N_SPINB(e),P_SPINS(c),S_FLIGHT::QAR1(F),XS(c)
- S(c);N_GUARD::R(I),XB(e)
- Refutation
- S(c);
- Try
- Q(F);CHECK
- Vars
- K(b);N_SPINB(e),S_FLIGHT::QAR1(F),XS(c)
- Refutation
- K(b);N_SPINP(f),P-FLIGHT,XQ(F)
- Try
- Q(F);CHECK
- Vars
- K(b);N_SPINP(f),OGATE,P-FLIGHT::QAB1(F),XS(c)
- K(b);N_SPINB(e),OGATE,S_FLIGHT::QAR1(F),XS(c)
- Refutation
- K(b);N_SPINP(f),P-FLIGHT
- Try
- Q(F);CHECK
- Vars
- K(b);N_SPINB(e),OGATE,S_FLIGHT::QAR1(F),XS(c)
- Refutation
- K(b);N_SPINB(e),N_SPINP(f),P-FLIGHT,XQ(F)
- Try
- Q(F);CHECK
- Vars
- K(b);N_SPINP(f),OGATE,P-FLIGHT::QAB1(F),XS(c)
- K(b);N_SPINB(e),OGATE,S_FLIGHT::QAR1(F),XS(c)
- Refutation
- K(b);N_SPINP(f),P-FLIGHT
- Try
- Q(F);CHECK
- Vars
- K(b);N_GUARD,N_SPINP(f),P-FLIGHT::QAR2(F)
- Refutation
- S(c);XQ(F)
- Try
- Q(F);
- Threat
- QAR1(F),XS(c)
- Vars
- K(b);N_GUARD,N_SPINP(f),P-FLIGHT,P_SPINS(c)::QAR2(F)
- K(b);N_SPINB(e),N_SPINP(f),P-FLIGHT::QAR2(F),XS(c)
- S(c);::R(H)
- Refutation
- S(c);
- Try
- P(A);
- Vars
- S(c);OGATE::P(A),XS(c)
- S(c);N_GUARD::R(I),XB(e)
- Refutation
- S(c);
- Try
- Actual
- S(B);
- Vars
- K(b);N_GUARD,N_SPINB(e),S_FLIGHT::QAR1(F)
- K(b);N_GUARD,N_SPINB(e),N_SPINP(f),S_FLIGHT::QAR1(F)
- S(c);N_GUARD::QAB1(F),XS(c)
- S(c);N_GUARD::QAB1(F)
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