MESON Chess Problem Database
Problem Display
PID: 65926 (8/2p1K2p/R6p/1QN3k1/2Rp2Pr/q2B2P1/7N/8 w - - 0 1)
Retter, Yosef
1st Prize, Sarajevo, 1984
#2
9 + 7
SOLUTION
- SOUND
- Sets
- 1...Qc1
- 2.Se4#
- 2.Se6#
- 1...Qb2
- 2.Se4#
- 2.Se6#
- 1...Qxc5+
- 2.Rxc5#
- 2.Qxc5#
- 1...Qa1
- 2.Se4#
- 2.Se6#
- 1...Qa2
- 2.Se4#
- 2.Se6#
- 1...Qb3
- 2.Se4#
- 2.Se6#
- 1...Qc3
- 2.Se4#
- 2.Se6#
- 1...Qxd3
- 2.Se4#
- 1...Qa4
- 2.Se4#
- 2.Se6#
- 1...Qa5
- 2.Se4#
- 2.Se6#
- 1...Qxa6
- 2.Se6#
- 1...Qc1
- Tries
- 1.Kf7?
- threat
- 2.Se4#
- 2.Se6#
- 1...Qxc5
- 2.Rxc5#
- 2.Qxc5#
- 1...h5
- 2.Se4#
- 1...Rxh2!
- threat
- 1.Rxd4?
- threat
- 2.Sf3#
- 2.Rd5#
- 1...Qxc5+
- 2.Qxc5#
- 1...Qxd3
- 2.Se4#
- 1...Rxg4
- 2.Rd5#
- 1...Qb2
- 2.Sf3#
- 2.Se4#
- 2.Se6#
- 1...Qa1
- 2.Sf3#
- 2.Se4#
- 2.Se6#
- 1...Qa2
- 2.Sf3#
- 2.Se4#
- 2.Se6#
- 1...Qb3
- 2.Sf3#
- 2.Se4#
- 2.Se6#
- 1...Qc3
- 2.Sf3#
- 2.Se4#
- 2.Se6#
- 1...c6
- 2.Sf3#
- 1...Rxh2!
- threat
- 1.Rd6?
- threat
- 2.Se4#
- 2.Se6#
- 2.Rd5#
- 1...Qxc5
- 2.Rxc5#
- 2.Qxc5#
- 1...Qxd3
- 2.Se4#
- 1...cxd6
- 2.Se6#
- 1...Qa8
- 2.Se4#
- 2.Se6#
- 1...h5
- 2.Se4#
- 1...c6
- 2.Se4#
- 2.Se6#
- 1...Rxh2!
- threat
- 1.Qc6?
- threat
- 2.Qd5#
- 2.Qf6#
- 1...Qxc5+
- 2.Rxc5#
- 2.Qxc5#
- 1...Qxd3
- 2.Qf6#
- 1...Qxa6
- 2.Se4#
- 2.Se6#
- 2.Qd5#
- 1...Rxg4
- 2.Qd5#
- 2.Qxh6#
- 1...Rxh2!
- threat
- 1.Qd7?
- threat
- 2.Sf3#
- 2.Qf5#
- 2.Qd5#
- 1...Qxc5+
- 2.Rxc5#
- 1...Rxh2
- 2.Qf5#
- 1...Rxg4
- 2.Qxg4#
- 2.Qf5#
- 2.Qd5#
- 1...c6
- 2.Sf3#
- 2.Qf5#
- 1...Qxd3!
- threat
- 1.Kf7?
- Keys
- 1.Qe8!
- threat
- 2.Qg8#
- 1...Qxc5+
- 2.Rxc5#
- 1...Qxd3
- 2.Se6#
- 1...Qxa6
- 2.Se4#
- 1...Rxg4
- 2.Sf3#
- threat
- 1.Qe8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- Q(a);N_PINS(G),XB(B)::QAR(F)+S(G),DCHECK
- Q(a);N_PINS(G),XR(H)::QAR(F)+S(G),DCHECK
- Tries
- Try
- K(I);N_SPINS(G),P-FLIGHT
- Threat
- DUALS(2)
- Vars
- P(e);::QAR(F)+S(G),DCHECK
- Refutation
- R(c);XS(A)
- Try
- R(D);XP(b)
- Threat
- DUALS(2)
- Vars
- Q(a);CHECK,OGATE,P_SPINQ(a),XS(G)::QAR(F),XQ(a)
- Q(a);N_PINS(G),XB(B)::QAR(F)+S(G),DCHECK
- R(c);XP(E)::R(D)
- P(f);::S(A)
- Refutation
- R(c);XS(A)
- Try
- R(H);N_SPINS(G)
- Threat
- DUALS(3)
- Vars
- Q(a);XB(B)::QAR(F)+S(G),DCHECK
- P(f);XR(H)::QAR(F)+S(G),DCHECK
- P(e);::QAR(F)+S(G),DCHECK
- Refutation
- R(c);XS(A)
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- Q(a);N_PINS(G),XB(B)::QAB1(F)
- Refutation
- R(c);XS(A)
- Try
- Q(F);
- Threat
- DUALS(3)
- Vars
- Q(a);CHECK,OGATE,XS(G)::R(D),XQ(a)
- R(c);XS(A)::QAR1(F)
- Refutation
- Q(a);N_PINS(G),XB(B)
- Try
- Actual
- Q(F);
- Threat
- QAR(F)
- Vars
- Q(a);CHECK,OGATE,XS(G)::R(D),XQ(a)
- Q(a);N_PINS(G),XB(B)::S(G)
- Q(a);N_PINS(G),XR(H)::S(G)
- R(c);SBLOCK,XP(E)::S(A)
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