MESON Chess Problem Database
Problem Display
PID: 285504 (7R/1B1K4/Qp6/8/8/8/6qr/R5rk w - - 0 1)
Libis, Zdenek
Prace, 1971
(First published on Sat Apr 17 1971)
#2
5 + 5
| 15601 | Albrecht-Leiss-Degener Collection | 2026 |
| 5454 | Near Snap | 2026 |
SOLUTION
- SOUND
- Sets
- 1...Qf3
- 2.Bxf3#
- 1...Qe4
- 2.Bxe4#
- 1...Qd5+
- 2.Bxd5#
- 1...Qc6+
- 2.Bxc6#
- 1...Qxb7+
- 2.Qxb7#
- 1...Rxa1
- 2.Qxa1#
- 1...Rb1
- 2.Rxb1#
- 1...Rc1
- 2.Rxc1#
- 1...Rd1+
- 2.Rxd1#
- 1...Re1
- 2.Rxe1#
- 1...Rf1
- 2.Rxf1#
- 2.Qxf1#
- 1...Rh3
- 2.Rxh3#
- 1...Rh4
- 2.Rxh4#
- 1...Rh5
- 2.Rxh5#
- 1...Rh6
- 2.Rxh6#
- 1...Rh7+
- 2.Rxh7#
- 1...Qf3
- Tries
- 1.Qf1?
- threat
- 2.Bxg2#
- 2.Qxg2#
- 2.Qxg1#
- 1...Qd5+
- 2.Bxd5#
- 1...Qc6+
- 2.Bxc6#
- 1...Rh7+
- 2.Rxh7#
- 1...Rxf1
- 2.Rxf1#
- 1...Rxh8
- 2.Qxg2#
- 2.Qxg1#
- 1...Rh3
- 2.Rxh3#
- 2.Qxg2#
- 2.Qxg1#
- 1...Rh4
- 2.Rxh4#
- 2.Qxg2#
- 2.Qxg1#
- 1...Rh5
- 2.Rxh5#
- 2.Qxg2#
- 2.Qxg1#
- 1...Rh6
- 2.Rxh6#
- 2.Qxg2#
- 2.Qxg1#
- 1...Qf3
- 2.Bxf3#
- 2.Qxg1#
- 2.Qxf3#
- 1...Qe4
- 2.Bxe4#
- 2.Qxg1#
- 1...Qxb7+!
- threat
- 1.Qe2?
- threat
- 2.Bxg2#
- 2.Qxg2#
- 1...Qd5+
- 2.Bxd5#
- 1...Qc6+
- 2.Bxc6#
- 1...Rd1+
- 2.Rxd1#
- 2.Qxd1#
- 1...Rh7+
- 2.Rxh7#
- 1...Rxa1
- 2.Qxg2#
- 1...Rxh8
- 2.Qxg2#
- 1...Rb1
- 2.Rxb1#
- 2.Qxg2#
- 1...Rc1
- 2.Rxc1#
- 2.Qxg2#
- 1...Re1
- 2.Rxe1#
- 2.Qxe1#
- 2.Qxg2#
- 1...Rf1
- 2.Rxf1#
- 2.Qxf1#
- 2.Qxg2#
- 1...Rh3
- 2.Rxh3#
- 2.Qxg2#
- 1...Rh4
- 2.Rxh4#
- 2.Qxg2#
- 1...Rh5
- 2.Rxh5#
- 2.Qxh5#
- 2.Qxg2#
- 1...Rh6
- 2.Rxh6#
- 2.Qxg2#
- 1...Qf3
- 2.Bxf3#
- 2.Rxh2#
- 2.Qxf3#
- 2.Qxh2#
- 1...Qe4
- 2.Bxe4#
- 2.Rxh2#
- 2.Qxh2#
- 2.Qxe4#
- 1...Qxb7+!
- threat
- 1.Qa2?
- threat
- 2.Bxg2#
- 2.Qxg2#
- 1...Qd5+
- 2.Bxd5#
- 2.Qxd5#
- 1...Qc6+
- 2.Bxc6#
- 1...Rd1+
- 2.Rxd1#
- 1...Rh7+
- 2.Rxh7#
- 1...Rxa1
- 2.Qxa1#
- 2.Qxg2#
- 1...Rxh8
- 2.Qxg2#
- 1...Rb1
- 2.Rxb1#
- 2.Qxb1#
- 2.Qxg2#
- 1...Rc1
- 2.Rxc1#
- 2.Qxg2#
- 1...Re1
- 2.Rxe1#
- 2.Qxg2#
- 1...Rf1
- 2.Rxf1#
- 2.Qxg2#
- 1...Rh3
- 2.Rxh3#
- 2.Qxg2#
- 1...Rh4
- 2.Rxh4#
- 2.Qxg2#
- 1...Rh5
- 2.Rxh5#
- 2.Qxg2#
- 1...Rh6
- 2.Rxh6#
- 2.Qxg2#
- 1...Qf3
- 2.Bxf3#
- 2.Rxh2#
- 2.Qxh2#
- 1...Qe4
- 2.Bxe4#
- 2.Rxh2#
- 2.Qxh2#
- 1...Qxb7+!
- threat
- 1.Qxb6?
- threat
- 2.Rxg1#
- 2.Qxg1#
- 1...Qd5+
- 2.Bxd5#
- 1...Qc6+
- 2.Bxc6#
- 2.Qxc6#
- 1...Qxb7+
- 2.Qxb7#
- 1...Rd1+
- 2.Rxd1#
- 1...Rh7+
- 2.Rxh7#
- 1...Rxh8
- 2.Qxg1#
- 1...Rh3
- 2.Rxh3#
- 2.Qxg1#
- 1...Rh4
- 2.Rxh4#
- 2.Qxg1#
- 1...Rh5
- 2.Rxh5#
- 2.Qxg1#
- 1...Rh6
- 2.Rxh6#
- 2.Qxg1#
- 2.Qxh6#
- 1...Rb1
- 2.Rxb1#
- 2.Qxb1#
- 1...Rc1
- 2.Rxc1#
- 1...Re1
- 2.Rxe1#
- 1...Rf1
- 2.Rxf1#
- 1...Rxa1!
- threat
- 1.Qa7?
- 1...Qd5+
- 2.Bxd5#
- 1...Qc6+
- 2.Bxc6#
- 1...Qxb7+
- 2.Qxb7#
- 1...Rd1+
- 2.Rxd1#
- 1...Rh7+
- 2.Rxh7#
- 1...Rxa1
- 2.Qxa1#
- 1...Qf3
- 2.Bxf3#
- 1...Qe4
- 2.Bxe4#
- 1...Rb1
- 2.Rxb1#
- 1...Rc1
- 2.Rxc1#
- 1...Re1
- 2.Rxe1#
- 1...Rf1
- 2.Rxf1#
- 1...Rh3
- 2.Rxh3#
- 1...Rh4
- 2.Rxh4#
- 1...Rh5
- 2.Rxh5#
- 1...Rh6
- 2.Rxh6#
- 1...b5
- 2.Rxg1#
- 2.Qxg1#
- 1...Rxh8!
- 1...Qd5+
- 1.Qf1?
- Keys
- 1.Qa8!
- threat
- 2.Bxg2#
- 1...Qd5+
- 2.Bxd5#
- 1...Qc6+
- 2.Bxc6#
- 1...Qxb7+
- 2.Qxb7#
- 1...Rd1+
- 2.Rxd1#
- 1...Rh7+
- 2.Rxh7#
- 1...Rxa1
- 2.Qxa1#
- 1...Rxh8
- 2.Qxh8#
- 1...Qf3
- 2.Bxf3#
- 1...Qe4
- 2.Bxe4#
- 1...Rb1
- 2.Rxb1#
- 1...Rc1
- 2.Rxc1#
- 1...Re1
- 2.Rxe1#
- 1...Rf1
- 2.Rxf1#
- 1...Rh3
- 2.Rxh3#
- 1...Rh4
- 2.Rxh4#
- 1...Rh5
- 2.Rxh5#
- 1...Rh6
- 2.Rxh6#
- threat
- 1.Qa8!
Anticipated by 78676(1959)
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- Q(c);OGATEB::B(C),XQ(c)
- Q(c);CHECK,OGATEB::B(C),XQ(c)
- Q(c);CHECK,N_SPINQ(c),OGATE,XB(C)::QAB(B),XQ(c)
- R(a);N_SPINR(a),OGATE,P_SPINR(d),XR(A)::QAB1(B),XR(a)
- R(a);OGATEB::R(A),XR(a)
- R(a);CHECK,OGATEB::R(A),XR(a)
- R(d);OGATEB::R(E),XR(d)
- R(d);CHECK,OGATEB::R(E),XR(d)
- Tries
- Try
- Q(B);
- Threat
- DUALS(3)
- Vars
- Q(c);CHECK,OGATEB::B(C),XQ(c)
- R(d);CHECK,OGATEB::R(E),XR(d)
- R(a);OGATE,XQ(B)::R(A),XR(a)
- Refutation
- Q(c);CHECK,N_SPINQ(c),XB(C)
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- Q(c);CHECK,OGATEB::B(C),XQ(c)
- R(d);CHECK,OGATEB::R(E),XR(d)
- R(a);N_SPINR(a),P_SPINR(d),SBLOCK,XR(A)::QAB1(B),XQ(c)
- R(d);XR(E)::QAB1(B),XQ(c)
- Refutation
- Q(c);CHECK,N_SPINQ(c),XB(C)
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- Q(c);CHECK,OGATEB::B(C),XQ(c)
- R(a);CHECK,OGATEB::R(A),XR(a)
- R(d);CHECK,OGATEB::R(E),XR(d)
- R(d);XR(E)::QAB1(B),XQ(c)
- Refutation
- Q(c);CHECK,N_SPINQ(c),XB(C)
- Try
- Q(B);XP(e)
- Threat
- DUALS(2)
- Vars
- Q(c);CHECK,OGATEB::B(C),XQ(c)
- Q(c);CHECK,N_SPINQ(c),OGATE,XB(C)::QAB(B),XQ(c)
- R(a);CHECK,OGATEB::R(A),XR(a)
- R(d);CHECK,OGATEB::R(E),XR(d)
- R(d);XR(E)::QAR1(B),XR(a)
- R(a);OGATEB::R(A),XR(a)
- Refutation
- R(a);N_SPINR(a),P_SPINR(d),XR(A)
- Try
- Q(B);
- Vars
- Q(c);CHECK,OGATEB::B(C),XQ(c)
- Q(c);CHECK,N_SPINQ(c),OGATE,XB(C)::QAB(B),XQ(c)
- R(a);CHECK,OGATEB::R(A),XR(a)
- R(d);CHECK,OGATEB::R(E),XR(d)
- R(a);N_SPINR(a),OGATE,P_SPINR(d),XR(A)::QAB1(B),XR(a)
- Q(c);OGATEB::B(C),XQ(c)
- R(a);OGATEB::R(A),XR(a)
- R(d);OGATEB::R(E),XR(d)
- Refutation
- R(d);XR(E)
- Try
- Actual
- Q(B);
- Threat
- B(C),XQ(c)
- Vars
- Q(c);CHECK,OGATEB::B(C),XQ(c)
- Q(c);CHECK,OGATE,XB(C)::QAB(B),XQ(c)
- R(a);CHECK,OGATEB::R(A),XR(a)
- R(d);CHECK,OGATEB::R(E),XR(d)
- R(a);N_SPINR(a),OGATE,P_SPINR(d),XR(A)::QAB1(B),XR(a)
- R(d);OGATE,XR(E)::QAB(B),XR(d)
- Q(c);OGATEB::B(C),XQ(c)
- R(a);OGATEB::R(A),XR(a)
- R(d);OGATEB::R(E),XR(d)
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