MESON Chess Problem Database
Problem Display
PID: 107799 (1QBRK3/2p1N1p1/4n1p1/r3k1Bb/8/2RPp3/8/6b1 w - - 0 1)
Brabec, Juraj
Sachove umeni (Ceskoslovensky sach), 1982
#2
8 + 9
| 6490 | yacpdb | 2009 |
| 5454 | Near Snap | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Rd5#
- 1...Ra2
- 2.Rd5#
- 1...Ra3
- 2.Rd5#
- 1...Ra4
- 2.Rd5#
- 1...Rd5
- 2.Rxd5#
- 1...Ra6
- 2.Rd5#
- 1...Ra7
- 2.Rd5#
- 1...Ra8
- 2.Rd5#
- 1...Sd4
- 2.Qxc7#
- 1...Sf4
- 2.Sc6#
- 2.Qxc7#
- 1...Sc5
- 2.Sc6#
- 2.Rd5#
- 2.Qxc7#
- 1...Sf8
- 2.Sc6#
- 2.Qxc7#
- 1...Ra1
- Tries
- 1.Rc4?
- threat
- 2.Re4#
- 1...Sxg5
- 2.Qb2#
- 1...Sxd8
- 2.Qxc7#
- 1...Ra4
- 2.Rd5#
- 1...Sd4
- 2.Qxc7#
- 1...Sc5
- 2.Sc6#
- 2.Rd5#
- 2.Qxc7#
- 2.Qb2#
- 1...Bf3!
- threat
- 1.Rc5+?
- 1...Sxc5
- 2.Sc6#
- 2.Rd5#
- 2.Qxc7#
- 2.Qb2#
- 1...Rxc5!
- 1...Sxc5
- 1.Rc6?
- threat
- 2.Rxe6#
- 1...Sxg5
- 2.Qxc7#
- 1...Sxd8
- 2.Qb2#
- 1...Rd5
- 2.Rxd5#
- 1...Ra6
- 2.Rd5#
- 1...Sd4
- 2.Qxc7#
- 1...Sf4
- 2.Qxc7#
- 2.Qb2#
- 1...Sc5
- 2.Rd5#
- 2.Qxc7#
- 2.Qb2#
- 1...Sf8
- 2.Qxc7#
- 2.Qb2#
- 1...Bg4!
- threat
- 1.Qb2?
- threat
- 2.Rc5#
- 1...Sxg5
- 2.Rc4#
- 1...Sxd8
- 2.Rc6#
- 1...Rd5
- 2.Rxd5#
- 1...Rc5
- 2.Rxc5#
- 1...Sc5
- 2.Sc6#
- 2.Rc1#
- 2.Rc2#
- 2.Ra3#
- 2.Rb3#
- 2.Rc4#
- 2.Rxc5#
- 2.Rd5#
- 1...c5
- 2.Rxc5#
- 2.Rd5#
- 1...Sd4!
- threat
- 1.Qb4?
- threat
- 2.Qe4#
- 1...Sxg5
- 2.Qd4#
- 1...Sxd8
- 2.Qf4#
- 1...Ra4
- 2.Rd5#
- 1...Sd4
- 2.Qxd4#
- 1...Sc5
- 2.Sc6#
- 2.Rd5#
- 2.Qd4#
- 2.Qf4#
- 1...Bf3!
- threat
- 1.Qb5+?
- 1...Sc5
- 2.Sc6#
- 2.Rxc5#
- 2.Rd5#
- 1...c5
- 2.Rd5#
- 1...Rxb5!
- 1...Sc5
- 1.Rc4?
- Keys
- 1.Rxc7!
- threat
- 2.Rc5#
- 1...Sxc7+
- 2.Qxc7#
- 1...Sxg5
- 2.Rc6#
- 1...Sxd8
- 2.Rc4#
- 1...Rd5
- 2.Rxd5#
- 1...Rc5
- 2.Rxc5#
- 1...Sc5
- 2.Sc6#
- 2.Rxc5#
- 2.Rc6#
- 2.Ra7#
- 2.Rb7#
- 2.Rd5#
- 2.Qb2#
- threat
- 1.Rxc7!
This anticipates 213170(1992)
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 8
- Sets
- R(c);N_GUARD::R1(G)
- R(c);N_GUARD::R1(G),XR(c)
- S(f);N_GUARD::QAB(E),XP(h)
- Tries
- Try
- R(A);
- Threat
- R1(A)
- Vars
- S(f);N_GUARD,XB(C)::QAB(E)
- S(f);N_GUARD,XR(G)::QAB(E),XP(h)
- R(c);N_GUARD::R1(G)
- S(f);N_GUARD::QAB(E),XP(h)
- Refutation
- B(e);
- Try
- R(A);CHECK
- Refutation
- R(c);XR(A)
- Try
- R(A);
- Threat
- R1(A),XS(f)
- Vars
- S(f);N_GUARD,XB(C)::QAB(E),XP(h)
- S(f);N_GUARD,XR(G)::QAB(E)
- R(c);N_GUARD::R1(G),XR(c)
- R(c);N_GUARD::R1(G)
- S(f);N_GUARD::QAB(E),XP(h)
- Refutation
- B(e);
- Try
- Q(E);N_PINP(h)
- Threat
- QAB(E)+R(A),DCHECK
- Vars
- S(f);N_GUARD,XB(C)::QAB(E)+R(A)
- S(f);N_GUARD,XR(G)::QAB(E)+R(A)
- R(c);N_GUARD::R1(G),XR(c)
- R(c);::QAB(E)+R(A),DCHECK,XR(c)
- Refutation
- S(f);
- Try
- Q(E);N_PINP(h)
- Threat
- QAR1(E)
- Vars
- S(f);N_GUARD,XB(C)::QAB1(E)
- S(f);N_GUARD,XR(G)::QAB1(E)
- R(c);N_GUARD::R1(G)
- S(f);N_GUARD::QAB1(E),XS(f)
- Refutation
- B(e);
- Try
- Q(E);CHECK,N_PINP(h)
- Vars
- P(h);P_SPINP(h)::R1(G)
- Refutation
- R(c);XQ(E)
- Try
- Actual
- R(A);XP(h)
- Threat
- QAB(E)+R(A),DCHECK
- Vars
- S(f);CHECK,OGATE,P_SPINS(f),XR(A)::QAB(E),XS(f)
- S(f);N_GUARD,XB(C)::QAB(E)+R(A)
- S(f);N_GUARD,XR(G)::QAB(E)+R(A)
- R(c);N_GUARD::R1(G),XR(c)
- R(c);::QAB(E)+R(A),DCHECK,XR(c)
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