MESON Chess Problem Database
Problem Display
PID: 225828 (8/3p2KB/nNp2p1Q/2P1P1R1/3k2P1/2R5/6p1/B3n1b1 w - - 0 1)
van, Koll AJ
Praca, 1958
#2
10 + 8
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Be3
- 2.Rc1#
- 2.Rc2#
- 2.Rc4#
- 1...Sxc5
- 2.Ra3#
- 2.Rb3#
- 2.Rd3#
- 2.Rf3#
- 2.Rg3#
- 2.Rh3#
- 1...fxe5
- 2.Qd6#
- 1...fxg5
- 2.Qd6#
- 1...Be3
- Tries
- 1.Rf5?
- threat
- 2.Qf4#
- 1...Ke4
- 2.Qf4#
- 1...Sxc5
- 2.Re3#
- 1...Bh2
- 2.Qe3#
- 1...Be3
- 2.Qxe3#
- 1...Sd3
- 2.Rc4#
- 1...fxe5!
- threat
- 1.Rg6?
- threat
- 2.Qf4#
- 1...Kxe5
- 2.Re3#
- 1...Sxc5
- 2.Re3#
- 1...fxe5
- 2.Rd6#
- 1...Bh2
- 2.Qe3#
- 1...Be3
- 2.Qxe3#
- 1...Sd3
- 2.Rc4#
- 1...Ke4!
- threat
- 1.Qh3?
- threat
- 2.Rc1#
- 2.Rc2#
- 2.Rc4#
- 1...f5
- 2.Rc4#
- 1...Sc2
- 2.Rxc2#
- 2.Rc4#
- 2.Qd3#
- 1...Sd3
- 2.Rc4#
- 2.Qxd3#
- 1...Sf3!
- threat
- 1.Qxf6?
- threat
- 2.Qf4#
- 2.Qd6#
- 2.e6#
- 1...Sxc5
- 2.Ra3#
- 2.Rb3#
- 2.Rd3#
- 2.Rf3#
- 2.Rg3#
- 2.Rh3#
- 2.Qd6#
- 2.e6#
- 1...Bh2
- 2.Qf2#
- 2.Qd6#
- 1...Be3
- 2.Rc1#
- 2.Rc2#
- 2.Rc4#
- 2.Qd6#
- 2.e6#
- 1...Sf3
- 2.Qf4#
- 2.Qd6#
- 1...Sb4
- 2.Qf4#
- 2.e6#
- 1...Sc7
- 2.Qf4#
- 2.e6#
- 1...d5
- 2.Qf4#
- 2.e6#
- 2.exd5 ep#
- 1...d6
- 2.Qf4#
- 2.Qxd6#
- 2.exd6#
- 2.e6#
- 1...Sd3!
- threat
- 1.exf6?
- threat
- 2.Ra3#
- 2.Rb3#
- 2.Rd3#
- 2.Rf3#
- 2.Rg3#
- 2.Rh3#
- 1...Sd3
- 2.Rxd3#
- 1...Be3
- 2.Rc1#
- 2.Rc2#
- 2.Ra3#
- 2.Rb3#
- 2.Rd3#
- 2.Rc4#
- 1...Sc2
- 2.Rd3#
- 1...Sf3
- 2.Ra3#
- 2.Rb3#
- 2.Rd3#
- 2.Rxf3#
- 1...d5!
- threat
- 1.e6?
- threat
- 2.Ra3#
- 2.Rb3#
- 2.Rd3#
- 2.Rf3#
- 2.Rg3#
- 2.Rh3#
- 2.Qxf6#
- 1...fxg5
- 2.Qf6#
- 1...dxe6
- 2.Ra3#
- 2.Rb3#
- 2.Rd3#
- 2.Rf3#
- 2.Rg3#
- 2.Rh3#
- 1...Sd3
- 2.Rxd3#
- 1...d5
- 2.Qxf6#
- 1...Bh2
- 2.Ra3#
- 2.Rb3#
- 2.Rd3#
- 2.Rf3#
- 2.Rg3#
- 2.Rh3#
- 1...Be3
- 2.Rc1#
- 2.Rc2#
- 2.Ra3#
- 2.Rb3#
- 2.Rd3#
- 2.Rc4#
- 2.Qxf6#
- 1...Sc2
- 2.Rd3#
- 2.Qxf6#
- 1...Sf3
- 2.Ra3#
- 2.Rb3#
- 2.Rd3#
- 2.Rxf3#
- 1...f5!
- threat
- 1.Rf5?
- Keys
- 1.Rh5!
- threat
- 2.Rc1#
- 2.Rc2#
- 2.Rc4#
- 2.Qf4#
- 1...Sxc5
- 2.Rc1#
- 2.Rc2#
- 2.Ra3#
- 2.Rb3#
- 2.Rd3#
- 2.Re3#
- 2.Rf3#
- 2.Rg3#
- 2.Rch3#
- 2.Rc4#
- 1...fxe5
- 2.Rc1#
- 2.Rc2#
- 2.Rc4#
- 2.Qd6#
- 1...f5
- 2.Qf4#
- 1...Bh2
- 2.Rc1#
- 2.Rc2#
- 2.Rc4#
- 2.Qe3#
- 1...Be3
- 2.Rc1#
- 2.Rc2#
- 2.Rc4#
- 2.Qxe3#
- 1...Sc2
- 2.Rxc2#
- 2.Rc4#
- 2.Qd2#
- 2.Qf4#
- 1...Sd3
- 2.Rc4#
- threat
- 1.Rh5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- P(g);OGATE,XP(E)::QAR2(H)
- P(g);OGATE,XR(F)::QAR2(H)
- Tries
- Try
- R(F);
- Threat
- QAR2(H)
- Vars
- K(d);P-FLIGHT::QAR1(H)
- S(e);SBLOCK,XP(D)::B(A)+R(B)
- B(b);N_GUARD::QAB1(H)
- B(b);N_GUARD::QAB1(H),XB(b)
- S(a);SBLOCK::B(A)+R(B),DCHECK
- Refutation
- P(g);XP(E)
- Try
- R(F);
- Threat
- QAR2(H)
- Vars
- K(d);S_FLIGHT,XP(E)::B(A)+R(B),DCHECK
- S(e);SBLOCK,XP(D)::B(A)+R(B)
- P(g);OGATE,SBLOCK,XP(E)::R(F)
- B(b);N_GUARD::QAB1(H)
- B(b);N_GUARD::QAB1(H),XB(b)
- S(a);SBLOCK::B(A)+R(B),DCHECK
- Refutation
- K(d);P-FLIGHT
- Try
- Q(H);
- Threat
- DUALS(3)
- Vars
- P(g);::B(A)+R(B),DCHECK
- Refutation
- S(a);
- Try
- Q(H);XP(g)
- Threat
- DUALS(3)
- Refutation
- S(a);
- Try
- P(E);XP(g)
- Threat
- DUALS(6)
- Vars
- S(a);::B(A)+R(B),DCHECK,XS(a)
- S(a);::B(A)+R(B),DCHECK
- Refutation
- P(h);
- Try
- P(E);
- Threat
- DUALS(7)
- Vars
- P(g);XR(F)::QAB(H)
- S(a);::B(A)+R(B),DCHECK,XS(a)
- P(h);::QAB(H),XP(g)
- Refutation
- P(g);
- Try
- Actual
- R(F);
- Threat
- DUALS(4)
- Vars
- P(g);::QAR2(H)
- S(a);::B(A)+R(B),DCHECK
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