MESON Chess Problem Database
Problem Display
PID: 18513 (5rbb/3NRpk1/1R4Pp/3p4/2qN3K/8/2B5/Q7 w - - 0 1)
Retter, Yosef
1st HM., Israel Problemists' Association-10 JT, 1956
#2
8 + 8
| 3841 | The Art of Israeli Chess Composition | 1983 |
SOLUTION
- SOUND
- Sets
- 1...Qf1
- 2.Sf5#
- 2.Se6#
- 1...Qa2
- 2.Sf5#
- 2.Se6#
- 1...Qe2
- 2.Sf5#
- 2.Se6#
- 1...Qb3
- 2.Sf5#
- 2.Se6#
- 1...Qd3
- 2.Sf5#
- 1...Qb5
- 2.Sf5#
- 2.Se6#
- 1...Qa6
- 2.Sf5#
- 2.Se6#
- 1...Qxc2
- 2.Sf5#
- 1...Qc3
- 2.Sf5#
- 2.Se6#
- 1...Qxd4+
- 2.Qxd4#
- 1...Qc5
- 2.Sf5#
- 2.Se6#
- 1...Qc6
- 2.Se6#
- 1...Qc7
- 2.Sf5#
- 2.Se6#
- 1...Qc8
- 2.Sf5#
- 2.Se6#
- 1...Qf1
- Tries
- 1.Be4?
- threat
- 2.Sf5#
- 2.Se6#
- 1...Qxd4
- 2.Qxd4#
- 1...dxe4
- 2.Sf5#
- 1...h5
- 2.Sf5#
- 1...Qc6
- 2.Se6#
- 1...Bh7!
- threat
- 1.Be4?
- Keys
- 1.Qg1!
- threat
- 2.gxf7#
- 1...Qxd4+
- 2.Qxd4#
- 1...Qxc2
- 2.Se6#
- 1...Bh7
- 2.gxh7#
- 1...Qf1
- 2.Se6#
- 1...Qe2
- 2.Sf5#
- 1...Qb3
- 2.Sf5#
- 2.Se6#
- 1...Qd3
- 2.Se6#
- 1...Qc3
- 2.Sf5#
- 2.Se6#
- 1...Qc6
- 2.Sf5#
- 1...Qc7
- 2.Sf5#
- 2.Se6#
- threat
- 1.Qg1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- Q(a);N_PINS(C)::QAB(A)+S(C),DCHECK
- Q(a);N_PINS(C),XB(B)::QAB(A)+S(C),DCHECK
- Q(a);CHECK,OGATE,P_SPINQ(a),XS(C)::QAB(A),XQ(a)
- Tries
- Try
- B(B);N_SPINS(C)
- Threat
- DUALS(2)
- Vars
- Q(a);OGATE,P_PINB(B),P_SPINQ(a),XS(C)::QAB(A),XQ(a)
- P(b);XB(B)::QAB(A)+S(C),DCHECK
- P(c);::QAB(A)+S(C),DCHECK
- Q(a);::QAB(A)+S(C),DCHECK
- Refutation
- B(g);
- Try
- Actual
- Q(A);
- Threat
- QAR(A)+P(F),XP(d)
- Vars
- Q(a);CHECK,OGATE,XS(C)::QAB(A),XQ(a)
- Q(a);N_PINS(C),XB(B)::S(C)
- B(g);OGATE::QAR(A)+P(F),XB(g)
- Q(a);N_PINS(C)::S(C)
Developed and maintained by Brian Stephenson.
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