MESON Chess Problem Database
Problem Display
PID: 71084 (2nK4/1b1Pp1p1/1QNPk3/5R1R/p1q1NB2/4p3/3Pr3/5B2 w - - 0 1)
Sallay, Bela Albert
Scacchi e Scienze Applicate, 1987
#2
11 + 9
SOLUTION
- SOUND
- Sets
- 1...Qa2
- 2.Sc5#
- 2.Sd4#
- 1...Qb3
- 2.Sc5#
- 2.Sd4#
- 1...Qd3
- 2.Sc5#
- 1...Qb5
- 2.Sd4#
- 1...Qa6
- 2.Sc5#
- 2.Sd4#
- 1...Qc1
- 2.Sd4#
- 1...Qc2
- 2.Sd4#
- 1...Qd4
- 2.Sxd4#
- 1...Qc5
- 2.Sxc5#
- 1...Re1
- 2.Bxc4#
- 1...Rf2
- 2.Bxc4#
- 1...Rg2
- 2.Bxc4#
- 1...Rh2
- 2.Bxc4#
- 1...Ba8
- 2.dxc8Q#
- 2.dxc8B#
- 1...Qa2
- Tries
- 1.Ke8?
- threat
- 2.Sd8#
- 2.Re5#
- 2.d8S#
- 1...Qxe4
- 2.Sd8#
- 2.d8S#
- 1...Qxc6
- 2.Re5#
- 1...Bxc6
- 2.Re5#
- 1...exd6
- 2.Sd8#
- 2.d8S#
- 1...g5
- 2.Re5#
- 1...Qb5
- 2.Sd4#
- 2.Sd8#
- 2.d8S#
- 1...Qd5
- 2.Sd8#
- 2.d8S#
- 1...Qc3
- 2.Sd8#
- 2.d8S#
- 1...Qd4
- 2.Sxd4#
- 2.Sd8#
- 2.d8S#
- 1...Qc5
- 2.Sxc5#
- 2.Sd8#
- 2.d8S#
- 1...Sxd6+!
- threat
- 1.Bh3?
- threat
- 2.Sg5#
- 2.Rf6#
- 2.Rf8#
- 1...Sxd6
- 2.Sg5#
- 2.Rf6#
- 1...Qb5
- 2.Sg5#
- 2.Sd4#
- 2.Rf6#
- 1...Qd5
- 2.Sg5#
- 2.Rf6#
- 1...Qc5
- 2.Sxc5#
- 2.Sg5#
- 2.Rf6#
- 1...Rg2
- 2.Rf6#
- 1...Rh2
- 2.Sg5#
- 2.Rf6#
- 1...g5
- 2.Sxg5#
- 2.Rh6#
- 1...Qxe4!
- threat
- 1.Qxe3?
- threat
- 2.Sc5#
- 1...Qxe4
- 2.Sd4#
- 1...Rxe3
- 2.Bxc4#
- 1...Qc5
- 2.Sxc5#
- 1...g5!
- threat
- 1.Qa5?
- threat
- 2.Sg5#
- 2.Qe5#
- 1...exd6
- 2.Sg5#
- 1...Qb5
- 2.Sd4#
- 1...Qd5
- 2.Qxd5#
- 1...Qc3
- 2.Sg5#
- 2.Qd5#
- 1...Qd4
- 2.Sg5#
- 2.Sxd4#
- 1...Qc5
- 2.Sxc5#
- 1...Rg2
- 2.Bxc4#
- 2.Qe5#
- 1...g5
- 2.Sxg5#
- 2.Rh6#
- 2.Qe5#
- 1...Qxe4!
- threat
- 1.Qc5?
- threat
- 2.Sg5#
- 2.Qxc4#
- 2.Qe5#
- 1...Qxc5
- 2.Sxc5#
- 1...Rxd2
- 2.Sg5#
- 2.Qe5#
- 1...Bxc6
- 2.Sg5#
- 2.Qe5#
- 1...Sxd6
- 2.Sg5#
- 2.Qe5#
- 1...exd6
- 2.Sg5#
- 1...Qa2
- 2.Sg5#
- 2.Sd4#
- 2.Qe5#
- 1...Qb3
- 2.Sg5#
- 2.Sd4#
- 2.Qe5#
- 1...Qd3
- 2.Sg5#
- 2.Qe5#
- 1...Qb5
- 2.Sg5#
- 2.Sd4#
- 1...Qd5
- 2.Qxd5#
- 1...Qa6
- 2.Sg5#
- 2.Sd4#
- 2.Qd5#
- 2.Qe5#
- 1...Qc1
- 2.Sg5#
- 2.Sd4#
- 2.Qd5#
- 2.Qe5#
- 1...Qc2
- 2.Sg5#
- 2.Sd4#
- 2.Qd5#
- 2.Qe5#
- 1...Qc3
- 2.Sg5#
- 2.Qd5#
- 1...Qb4
- 2.Sg5#
- 2.Qd5#
- 2.Qe5#
- 1...Qd4
- 2.Sg5#
- 2.Sxd4#
- 1...Rg2
- 2.Bxc4#
- 2.Qxc4#
- 2.Qe5#
- 1...Ba6
- 2.Sg5#
- 2.Qe5#
- 1...Sb6
- 2.Sg5#
- 2.Qe5#
- 1...g5
- 2.Sxg5#
- 2.Rh6#
- 2.Qe5#
- 1...Qxe4!
- threat
- 1.Qb3?
- threat
- 2.Sc5#
- 2.Sd4#
- 2.Qxc4#
- 1...Qxb3
- 2.Sc5#
- 2.Sd4#
- 1...Rxd2
- 2.Sc5#
- 1...Bxc6
- 2.Sc5#
- 1...Sxd6
- 2.Sc5#
- 2.Sd4#
- 1...exd6
- 2.Sd4#
- 1...g5
- 2.Sd4#
- 1...Qd5
- 2.Sc5#
- 2.Sd4#
- 2.Qxd5#
- 1...Ba6
- 2.Sc5#
- 2.Sd4#
- 1...Sb6
- 2.Sc5#
- 2.Sd4#
- 1...axb3!
- threat
- 1.Qb5?
- threat
- 2.Sg5#
- 2.Qxc4#
- 2.Qe5#
- 1...Qxb5
- 2.Sd4#
- 1...Qxc6
- 2.Sg5#
- 2.Qe5#
- 1...Rxd2
- 2.Sg5#
- 2.Qe5#
- 1...Bxc6
- 2.Sg5#
- 2.Qe5#
- 1...Sxd6
- 2.Sg5#
- 2.Qe5#
- 1...exd6
- 2.Sg5#
- 1...Qa2
- 2.Sc5#
- 2.Sg5#
- 2.Sd4#
- 2.Qe5#
- 1...Qb3
- 2.Sc5#
- 2.Sg5#
- 2.Sd4#
- 2.Qe5#
- 1...Qd3
- 2.Sc5#
- 2.Sg5#
- 2.Qe5#
- 1...Qd5
- 2.Qxd5#
- 1...Qc1
- 2.Sg5#
- 2.Sd4#
- 2.Qd5#
- 2.Qe5#
- 1...Qc2
- 2.Sg5#
- 2.Sd4#
- 2.Qd5#
- 2.Qe5#
- 1...Qc3
- 2.Sg5#
- 2.Qd5#
- 1...Qb4
- 2.Sg5#
- 2.Qd5#
- 2.Qe5#
- 1...Qd4
- 2.Sg5#
- 2.Sxd4#
- 1...Qc5
- 2.Sxc5#
- 1...Rg2
- 2.Bxc4#
- 2.Qxc4#
- 2.Qe5#
- 1...Ba6
- 2.Sg5#
- 2.Qe5#
- 1...Sb6
- 2.Sg5#
- 2.Qe5#
- 1...g5
- 2.Sxg5#
- 2.Rh6#
- 2.Qe5#
- 1...Qxe4!
- threat
- 1.dxe7?
- threat
- 2.Sd4#
- 1...Qxc6
- 2.Sc5#
- 1...Bxc6
- 2.dxc8Q#
- 2.dxc8B#
- 1...Sxb6
- 2.e8Q#
- 2.e8R#
- 1...Qd4
- 2.Sxd4#
- 1...Sd6!
- threat
- 1.Ke8?
- Keys
- 1.Qb1!
- threat
- 2.Sg5#
- 1...Qxe4
- 2.Qxe4#
- 1...g5
- 2.Sxg5#
- 1...Qd3
- 2.Sc5#
- 1...Qc2
- 2.Sd4#
- 1...Rg2
- 2.Bxc4#
- threat
- 1.Qb1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 7
- Sets
- Q(d);N_GUARD::S(C)
- Q(d);N_GUARD::S(H)
- Q(d);N_GUARD::S(H),XQ(d)
- Q(d);N_GUARD::S(C),XQ(d)
- R(a);OGATE::B(A),XQ(d)
- B(f);N_GUARD::PXS(i)=Q
- Tries
- Try
- K(K);P-FLIGHT
- Threat
- DUALS(3)
- Vars
- Q(d);P_PINP(J),XS(H)::R1(E)
- B(f);P_PINP(J),XS(H)::R1(E)
- P(h);::R1(E)
- Refutation
- S(i);CHECK,XP(I)
- Try
- B(A);
- Threat
- DUALS(3)
- Vars
- R(a);::B(A)+R(E),DCHECK
- Refutation
- Q(d);XS(C)
- Try
- Q(G);XP(b)
- Threat
- QAR(G)+S(C),DCHECK
- Vars
- Q(d);N_GUARD,P_SPINQ(d),XS(C)::S(H)
- R(a);OGATE,XQ(G)::B(A),XQ(d)
- Q(d);::QAR(G)+S(C),DCHECK,XQ(d)
- Refutation
- P(h);
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- P(g);XP(I)::S(C)
- Q(d);N_GUARD::S(H)
- Q(d);N_GUARD::QAB1(G),XQ(d)
- Q(d);N_GUARD::S(C),XQ(d)
- Refutation
- Q(d);XS(C)
- Try
- Q(G);
- Threat
- DUALS(3)
- Vars
- Q(d);XQ(G)::S(C),XQ(d)
- P(g);XP(I)::S(C)
- Q(d);N_GUARD::QAB1(G),XQ(d)
- Refutation
- Q(d);XS(C)
- Try
- Q(G);P_PINQ(d)
- Threat
- DUALS(3)
- Vars
- R(a);XP(B)::S(C)
- B(f);XS(H)::S(C)
- P(g);XP(I)::S(H)
- P(h);::S(H)
- Refutation
- P(c);N_SPINQ(d),XQ(G)
- Try
- Q(G);
- Threat
- DUALS(3)
- Vars
- Q(d);N_GUARD,XQ(G)::S(H)
- P(g);XP(I)::S(C)
- Q(d);N_GUARD::QAB1(G),XQ(d)
- Q(d);N_GUARD::S(C),XQ(d)
- Refutation
- Q(d);XS(C)
- Try
- P(I);XP(g)
- Threat
- QAR(G)+S(H),DCHECK
- Vars
- Q(d);N_GUARD,P_SPINQ(d),XS(H)::S(C)
- B(f);N_GUARD,P_SPINB(f),XS(H)::PXS(i)=Q
- S(i);N_GUARD,XQ(G)::P=Q
- Q(d);P_PINP(J)::QAR(G)+S(H),DCHECK,XQ(d)
- Refutation
- S(i);
- Try
- Actual
- Q(G);
- Threat
- S(C)
- Vars
- Q(d);OGATE,XS(C)::QAR2(G),XQ(d)
- P(h);::S(C),XP(h)
- Q(d);N_GUARD::S(C)
- Q(d);N_GUARD::S(H)
- R(a);OGATE::B(A),XQ(d)
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).