MESON Chess Problem Database
Problem Display
PID: 195848 (4QB1K/N1P1P1N1/P2k1p1p/3pb3/2qp2r1/P1R3pB/8/2r5 w - - 0 1)
Retter, Yosef
1st Prize, Israel Ring Ty., 2015
#2
11 + 10
| 145 | StrateGems | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Kc5
- 2.Qc6#
- 1...Kxc7
- 2.Qd8#
- 1...Qf1
- 2.Sc8#
- 2.Qc6#
- 2.Qd8#
- 2.c8S#
- 1...Qa2
- 2.Sb5#
- 2.Sc8#
- 2.Qc6#
- 2.Qd8#
- 2.c8S#
- 1...Qe2
- 2.Sc8#
- 2.Qc6#
- 2.Qd8#
- 2.c8S#
- 1...Qb3
- 2.Sc8#
- 2.Qc6#
- 2.Qd8#
- 2.c8S#
- 1...Qd3
- 2.Sc8#
- 2.Qc6#
- 2.Qd8#
- 2.c8S#
- 1...Qb5
- 2.Sxb5#
- 2.Sc8#
- 2.c8S#
- 1...Qxa6
- 2.Qd8#
- 1...Qa4
- 2.Sc8#
- 2.c8S#
- 1...Qb4
- 2.Sc8#
- 2.Qc6#
- 2.Qd8#
- 2.c8S#
- 1...Qc5
- 2.Qd8#
- 1...Qc6
- 2.Qxc6#
- 1...Qxc7
- 2.Sb5#
- 1...Kc5
- Tries
- 1.Sb5+?
- 1...Qxb5
- 2.c8S#
- 1...Kc5!
- 1...Qxb5
- 1.Sc8+?
- 1...Kc5
- 2.Se6#
- 1...Kxc7!
- 1...Kc5
- 1.Sf5+?
- 1...Kc5
- 2.Qb5#
- 2.Qc6#
- 1...Kxc7
- 2.Qd8#
- 1...Ke6!
- 1...Kc5
- 1.Qb5?
- threat
- 2.e8S#
- 1...Kxc7
- 2.Se8#
- 1...Qxb5
- 2.e8Q#
- 2.e8B#
- 1...Qc6
- 2.Qxc6#
- 1...Qf1
- 2.Sc8#
- 2.Qc6#
- 2.c8S#
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Qa2
- 2.Sc8#
- 2.Qc6#
- 2.c8S#
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Qe2
- 2.Sc8#
- 2.Qc6#
- 2.c8S#
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Qb3
- 2.Sc8#
- 2.Qc6#
- 2.c8S#
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Qd3
- 2.Sc8#
- 2.Qc6#
- 2.c8S#
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Qa4
- 2.Sc8#
- 2.c8S#
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Qb4
- 2.Sc8#
- 2.Qc6#
- 2.c8S#
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Bf4!
- threat
- 1.Qd7+?
- 1...Kc5
- 2.Qc6#
- 1...Kxd7!
- 1...Kc5
- 1.Qc8?
- threat
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Qxa6
- 2.Sf5#
- 2.Se8#
- 2.Qe6#
- 2.Qd8#
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Qxc3
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Rxc3
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...dxc3
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Bf4
- 2.e8Q#
- 2.e8R#
- 1...Qf1
- 2.Se8#
- 2.Qe6#
- 2.Qd8#
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Qa2
- 2.Sb5#
- 2.Sf5#
- 2.Se8#
- 2.Qe6#
- 2.Qd8#
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Qe2
- 2.Sf5#
- 2.Se8#
- 2.Qe6#
- 2.Qd8#
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Qb3
- 2.Sf5#
- 2.Se8#
- 2.Qe6#
- 2.Qd8#
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Qd3
- 2.Se8#
- 2.Qe6#
- 2.Qd8#
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Qb5
- 2.Sxb5#
- 2.Sf5#
- 2.Qe6#
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Qa4
- 2.Sf5#
- 2.Qe6#
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Qb4
- 2.Sf5#
- 2.Se8#
- 2.Qe6#
- 2.Qd8#
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Qc5
- 2.Sf5#
- 2.Se8#
- 2.Qd8#
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Qc6
- 2.Sf5#
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Ra1
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Rb1
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Rd1
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Re1
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Rf1
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Rg1
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Rh1
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Rc2
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Re4
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Rf4
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Rh4
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Rg5
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Rg6
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...g2
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...d3
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...f5
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...h5
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Kc5!
- threat
- 1.c8Q?
- threat
- 2.Sf5#
- 2.Qed7#
- 2.Qed8#
- 1...Qxc8
- 2.Sb5#
- 2.Sxc8#
- 1...Rxg7
- 2.Qed7#
- 2.Qed8#
- 1...Qf1
- 2.Qe6#
- 2.Qcd7#
- 2.Qec6#
- 2.Qed7#
- 2.Qc5#
- 2.Qcc6#
- 2.Qc7#
- 2.Qb8#
- 2.Qcd8#
- 2.Qed8#
- 1...Qd3
- 2.Qe6#
- 2.Qcd7#
- 2.Qec6#
- 2.Qed7#
- 2.Qc5#
- 2.Qcc6#
- 2.Qc7#
- 2.Qb8#
- 2.Qcd8#
- 2.Qed8#
- 1...Qb5
- 2.Sxb5#
- 2.Sf5#
- 2.Qe6#
- 2.Qc7#
- 1...Qa4
- 2.Sf5#
- 2.Qe6#
- 2.Qc5#
- 2.Qc7#
- 2.Qb8#
- 1...Qc6
- 2.Sf5#
- 2.Qexc6#
- 2.Qcxc6#
- 1...Qc7
- 2.Sb5#
- 2.Sf5#
- 2.Qe6#
- 2.Qxc7#
- 1...Rf1
- 2.Qed7#
- 2.Qed8#
- 1...Rf4
- 2.Qed7#
- 2.Qed8#
- 1...Rg5
- 2.Qed7#
- 2.Qed8#
- 1...f5
- 2.Qed7#
- 2.Qed8#
- 1...Bf4!
- threat
- 1.c8S+?
- 1...Kc5
- 2.Se6#
- 2.Qb5#
- 2.Qc6#
- 1...Qxc8
- 2.Sb5#
- 2.Sxc8#
- 1...Kc7!
- 1...Kc5
- 1.Sb5+?
- Keys
- 1.Qb8!
- threat
- 2.e8Q#
- 2.e8B#
- 1...Kc5
- 2.Qb4#
- 1...Kd7
- 2.Qd8#
- 2.e8Q#
- 2.e8B#
- 1...Qxa6
- 2.Qd8#
- 2.c8Q#
- 2.c8B#
- 2.e8Q#
- 2.e8B#
- 1...Qxc3
- 2.e8Q#
- 2.e8B#
- 1...Qxc7
- 2.Qxc7#
- 2.e8Q#
- 2.e8B#
- 1...Rxc3
- 2.e8Q#
- 2.e8B#
- 1...dxc3
- 2.e8Q#
- 2.e8B#
- 1...Qf1
- 2.Qd8#
- 2.c8Q#
- 2.c8B#
- 2.e8Q#
- 2.e8B#
- 1...Qa2
- 2.Qd8#
- 2.c8Q#
- 2.c8B#
- 2.e8Q#
- 2.e8B#
- 1...Qe2
- 2.Qd8#
- 2.c8Q#
- 2.c8B#
- 2.e8Q#
- 2.e8B#
- 1...Qb3
- 2.Qd8#
- 2.e8Q#
- 2.e8B#
- 1...Qd3
- 2.Qd8#
- 2.c8Q#
- 2.c8B#
- 2.e8Q#
- 2.e8B#
- 1...Qb5
- 2.e8Q#
- 2.e8B#
- 1...Qa4
- 2.c8Q#
- 2.c8B#
- 2.e8Q#
- 2.e8B#
- 1...Qb4
- 2.Qd8#
- 2.e8Q#
- 2.e8B#
- 1...Qc5
- 2.Qd8#
- 2.e8Q#
- 2.e8B#
- 1...Qc6
- 2.e8Q#
- 2.e8B#
- 1...Ra1
- 2.e8Q#
- 2.e8B#
- 1...Rb1
- 2.e8Q#
- 2.e8B#
- 1...Rd1
- 2.e8Q#
- 2.e8B#
- 1...Re1
- 2.e8Q#
- 2.e8B#
- 1...Rf1
- 2.e8Q#
- 2.e8B#
- 1...Rg1
- 2.e8Q#
- 2.e8B#
- 1...Rh1
- 2.e8Q#
- 2.e8B#
- 1...Rc2
- 2.e8Q#
- 2.e8B#
- 1...Re4
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Rf4
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Rh4
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Rg5
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Rg6
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...g2
- 2.e8Q#
- 2.e8B#
- 1...d3
- 2.e8Q#
- 2.e8B#
- 1...f5
- 2.e8Q#
- 2.e8B#
- 1...h5
- 2.e8Q#
- 2.e8B#
- threat
- 1.Qb8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 5
- Sets
- K(h);P_SPINQ(c),S_FLIGHT::QAR1(I)
- K(h);P_SPINQ(c),S_FLIGHT,XP(F)::QAB1(I)
- Q(c);XP(D)::QAR2(I)
- Q(c);::QAR2(I)
- Q(c);N_GUARD::QAR1(I),XQ(c)
- Q(c);N_GUARD,XP(F)::S(E)
- Tries
- Try
- S(E);CHECK
- Vars
- Q(c);N_GUARD,XS(E)::P=S
- Refutation
- K(h);P_SPINQ(c),S_FLIGHT
- Try
- S(E);CHECK
- Vars
- K(h);P_SPINQ(c),S_FLIGHT::S(H)
- Refutation
- K(h);P_SPINQ(c),S_FLIGHT,XP(F)
- Try
- S(H);CHECK
- Vars
- K(h);P_SPINQ(c),S_FLIGHT,XP(F)::QAB1(I)
- Refutation
- K(h);P-FLIGHT
- Try
- Q(I);
- Threat
- P=S
- Vars
- K(h);P_SPINQ(c),S_FLIGHT,XP(F)::S(H)
- Q(c);XQ(I)::P=Q
- Q(c);N_GUARD::QAR1(I),XQ(c)
- Refutation
- B(g);
- Try
- Q(I);CHECK
- Vars
- K(h);P_SPINQ(c),S_FLIGHT::QAR1(I)
- Refutation
- K(h);P-FLIGHT,P_SPINR(e),XQ(I)
- Try
- Q(I);
- Threat
- DUALS(4)
- Vars
- B(g);::P=Q
- Refutation
- K(h);P_SPINQ(c),S_FLIGHT
- Try
- P(F);
- Threat
- DUALS(3)
- Refutation
- B(g);
- Try
- P(F);CHECK
- Refutation
- K(h);P_SPINQ(c),S_FLIGHT
- Try
- Actual
- Q(I);
- Threat
- P=Q
- Vars
- K(h);P_SPINQ(c),S_FLIGHT::QAB1(I)
- Q(c);XR(B)::P=Q
- R(a);XR(B)::P=Q
- P(d);XR(B)::P=Q
- Q(c);::P=Q
- R(a);::P=Q
- P(b);::P=Q
- P(d);::P=Q
- P(i);P_PINS(H)::P=Q
- P(j);::P=Q
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).