MESON Chess Problem Database
Problem Display
PID: 65818 (r3n3/2p2B2/2q3Rp/2N2k1N/2P1R3/7P/1BQP4/5n1K w - - 0 1)
Kovacevic, Marjan
2nd Prize, Phenix, 1994
#2
11 + 7
SOLUTION
- SOUND
- Sets
- 1...Qa4
- 2.Rf4#
- 2.Re5#
- 1...Qxe4+
- 2.Qxe4#
- 1...Qb5
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Rf4#
- 2.Reg4#
- 2.Rh4#
- 2.Re5#
- 2.Ree6#
- 2.Re7#
- 2.Rxe8#
- 1...Qd7
- 2.Rf4#
- 2.Re5#
- 1...Qxc5
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Rf4#
- 2.Reg4#
- 2.Rh4#
- 2.Re5#
- 2.Ree6#
- 2.Re7#
- 2.Rxe8#
- 1...Qa6
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Rf4#
- 2.Reg4#
- 2.Rh4#
- 2.Re5#
- 2.Ree6#
- 2.Re7#
- 2.Rxe8#
- 1...Qb6
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Rf4#
- 2.Reg4#
- 2.Rh4#
- 2.Re5#
- 2.Ree6#
- 2.Re7#
- 2.Rxe8#
- 1...Qd6
- 2.Rf4#
- 2.Re5#
- 1...Qe6
- 2.Rf4#
- 2.Re5#
- 2.Rexe6#
- 1...Qf6
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Rf4#
- 2.Reg4#
- 2.Rh4#
- 2.Re5#
- 2.Re6#
- 2.Re7#
- 2.Rxe8#
- 1...Qxg6
- 2.Rg4#
- 2.Re5#
- 1...Sxd2
- 2.Sg3#
- 1...Sh2
- 2.Sg3#
- 1...Se3
- 2.Sg3#
- 1...Sg3+
- 2.Sxg3#
- 1...Sd6
- 2.Sg7#
- 1...Sf6
- 2.Sg7#
- 1...Sg7
- 2.Sxg7#
- 1...Qa4
- Tries
- 1.Be6+?
- 1...Qxe6
- 2.Rf4#
- 2.Re5#
- 2.Rexe6#
- 1...Kxg6!
- 1...Qxe6
- 1.Bxe8?
- threat
- 2.Sg7#
- 1...Qxe4+
- 2.Qxe4#
- 1...Sg3+
- 2.Sxg3#
- 1...Qxe8
- 2.Rf4#
- 2.Re5#
- 2.Ree6#
- 2.Re7#
- 2.Rxe8#
- 1...Qxg6
- 2.Rg4#
- 2.Re5#
- 1...Qd7
- 2.Rf4#
- 2.Re5#
- 1...Qf6
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Rf4#
- 2.Reg4#
- 2.Rh4#
- 2.Re5#
- 2.Re6#
- 2.Re7#
- 1...Rxe8!
- threat
- 1.Rg2?
- threat
- 2.Rf4#
- 2.Re5#
- 1...Qxe4
- 2.Be6#
- 2.Bg6#
- 2.Qxe4#
- 1...Sg3+!
- threat
- 1.Rxc6?
- threat
- 2.Rg4#
- 2.Re5#
- 1...Kg5
- 2.Rg4#
- 1...Sxd2
- 2.Re5#
- 1...Ra3
- 2.Re5#
- 1...Rd8
- 2.Re5#
- 1...Se3
- 2.Re5#
- 1...Sd6
- 2.Re5#
- 1...Sf6
- 2.Re5#
- 1...Sg3+!
- threat
- 1.Rf6+?
- 1...Kg5
- 2.h4#
- 1...Qxf6
- 2.Rg4#
- 2.Re5#
- 1...Sxf6!
- 1...Kg5
- 1.Qd1?
- threat
- 2.Qf3#
- 2.Qg4#
- 2.Qxf1#
- 1...Sg3+
- 2.Sxg3#
- 1...Qxc5
- 2.Rf4#
- 2.Qf3#
- 2.Qg4#
- 1...Qxg6
- 2.Re5#
- 1...Sxd2
- 2.Sg3#
- 2.Qg4#
- 1...Qd6
- 2.Qg4#
- 1...Ra1
- 2.Qf3#
- 2.Qg4#
- 1...Ra3
- 2.Qg4#
- 1...Sh2
- 2.Sg3#
- 1...Se3
- 2.Sg3#
- 2.Qf3#
- 1...Sf6
- 2.Sg7#
- 2.Qf3#
- 2.Qxf1#
- 1...Qxe4+!
- threat
- 1.Qd3?
- threat
- 2.Qxf1#
- 2.Qf3#
- 1...Qxe4+
- 2.Qxe4#
- 1...Sg3+
- 2.Sxg3#
- 1...Qxc5
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Rf4#
- 2.Reg4#
- 2.Rh4#
- 2.Re5#
- 2.Ree6#
- 2.Re7#
- 2.Rxe8#
- 2.Qf3#
- 1...Qxg6
- 2.Rg4#
- 2.Re5#
- 2.Qd5#
- 1...Sxd2
- 2.Sg3#
- 1...Qd6
- 2.Rf4#
- 2.Re5#
- 1...Ra1
- 2.Qf3#
- 1...Sh2
- 2.Sg3#
- 1...Se3
- 2.Sg3#
- 1...Ra3!
- threat
- 1.d3?
- threat
- 2.Qf2#
- 1...Qxe4+
- 2.dxe4#
- 1...Sg3+
- 2.Sxg3#
- 1...Qxc5
- 2.Rf4#
- 1...Qxg6
- 2.Re5#
- 1...Sd2
- 2.Sg3#
- 1...Sh2
- 2.Sg3#
- 1...Qd6!
- threat
- 1.d4?
- threat
- 2.Qf2#
- 1...Qxe4+
- 2.Qxe4#
- 1...Sg3+
- 2.Sxg3#
- 1...Qxc5
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Rf4#
- 2.Reg4#
- 2.Rh4#
- 2.Re5#
- 2.Ree6#
- 2.Re7#
- 2.Rxe8#
- 1...Qxg6
- 2.Rg4#
- 2.Re5#
- 1...Qd6
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Rf4#
- 2.Reg4#
- 2.Rh4#
- 2.Re5#
- 2.Ree6#
- 2.Re7#
- 2.Rxe8#
- 1...Sd2
- 2.Sg3#
- 1...Sh2
- 2.Sg3#
- 1...Ra3!
- threat
- 1.Be6+?
- Keys
- 1.Kg1!
- threat
- 2.Rf4#
- 2.Re5#
- 1...Qxc5+
- 2.Re3#
- 1...Qxg6+
- 2.Rg4#
- 1...Qxe4
- 2.Qxe4#
- threat
- 1.Kg1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 7
- Sets
- Q(c);CHECK,OGATE,P_SPINQ(c),XR(G)::QAB1(C),XQ(c)
- S(a);N_GUARD,XP(D)::S(I)
- S(a);N_GUARD::S(I)
- S(a);CHECK,N_GUARD::S(I),XS(a)
- S(g);N_GUARD::S(I)
- S(g);N_GUARD::S(I),XS(g)
- Tries
- Try
- B(K);CHECK
- Refutation
- K(b);S_FLIGHT,XR(J)
- Try
- B(K);XS(g)
- Threat
- S(I)
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XR(G)::QAB1(C),XQ(c)
- S(a);CHECK,N_GUARD::S(I),XS(a)
- Refutation
- R(f);XB(K)
- Try
- R(J);N_SPINR(G)
- Threat
- DUALS(2)
- Refutation
- S(a);CHECK
- Try
- R(J);N_SPINR(G),XQ(c)
- Threat
- DUALS(2)
- Vars
- K(b);P-FLIGHT::R1(G)
- S(a);XP(D)::QAB(C)+R(G),DCHECK
- R(f);::QAB(C)+R(G),DCHECK
- S(a);::QAB(C)+R(G),DCHECK
- S(g);::QAB(C)+R(G),DCHECK
- Refutation
- S(a);CHECK
- Try
- R(J);CHECK
- Vars
- K(b);P-FLIGHT::P(E)
- Refutation
- S(g);XR(J)
- Try
- Q(C);
- Threat
- DUALS(3)
- Vars
- S(a);CHECK,N_GUARD::S(I),XS(a)
- Q(c);N_PINR(G),XR(J)::R1(G)
- Q(c);N_PINR(G)::QAB1(C)
- R(f);::QAB1(C)
- S(a);N_GUARD::S(I)
- Refutation
- Q(c);CHECK,XR(G)
- Try
- Q(C);
- Threat
- DUALS(2)
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XR(G)::QAB1(C),XQ(c)
- S(a);CHECK,N_GUARD::S(I),XS(a)
- S(a);N_GUARD,XP(D)::S(I)
- R(f);::QAR2(C)
- S(a);N_GUARD::S(I)
- Refutation
- R(f);
- Try
- P(D);
- Threat
- QAR(C)
- Vars
- Q(c);CHECK,OGATE,XR(G)::P(D),XQ(c)
- S(a);CHECK,N_GUARD::S(I),XS(a)
- Q(c);N_PINR(G),XS(H)::R1(G)
- Q(c);N_PINR(G),XR(J)::R1(G)
- S(a);N_GUARD::S(I)
- Refutation
- Q(c);N_PINR(G)
- Try
- P(D);
- Threat
- QAR(C)
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XR(G)::QAB1(C),XQ(c)
- S(a);CHECK,N_GUARD::S(I),XS(a)
- S(a);N_GUARD::S(I)
- Refutation
- R(f);
- Try
- Actual
- K(A);N_SPINR(G),P-FLIGHT
- Threat
- DUALS(2)
- Vars
- Q(c);CHECK,N_GUARD,XS(H)::QAB(C)+R(G)
- Q(c);CHECK,N_GUARD,XR(J)::QAB(C)+R(G)
- Q(c);OGATE,P_SPINQ(c),XR(G)::QAB1(C),XQ(c)
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).