MESON Chess Problem Database
Problem Display
PID: 40150 (8/2p1Q3/1rP2N2/Rq6/1Npk2KR/2r5/n1B1pPpp/4B1bb w - - 0 1)
Ivanov, Vadim Aleksandrovich
Retter, Yosef
Variantim, 2001
#2
10 + 12
SOLUTION
- SOUND
- Sets
- 1...Qa4
- 2.Kf5#
- 2.Kg5#
- 2.Kh5#
- 2.Rd5#
- 2.Qc5#
- 2.Qd8#
- 2.Qe4#
- 2.Qe5#
- 2.Qd7#
- 1...Qa6
- 2.Kf5#
- 2.Kg5#
- 2.Kh5#
- 2.Rd5#
- 2.Qc5#
- 2.Qd8#
- 2.Qe4#
- 2.Qe5#
- 2.Qd7#
- 1...Qxc6
- 2.Qe5#
- 1...Qxb4
- 2.Kf5#
- 2.Kg5#
- 2.Kh5#
- 2.Rd5#
- 2.Qe4#
- 2.Qe5#
- 1...Qc5
- 2.Qxc5#
- 2.Qe4#
- 1...Qd5
- 2.Rxd5#
- 1...Qe5
- 2.Qxe5#
- 1...Qf5+
- 2.Kxf5#
- 1...Qg5+
- 2.Kxg5#
- 1...Qh5+
- 2.Kxh5#
- 1...Rxc2
- 2.Kf3#
- 2.Kg3#
- 2.Kh3#
- 2.Qe3#
- 1...Re3
- 2.Qxe3#
- 1...Rf3
- 2.Kxf3#
- 1...Rg3+
- 2.Kxg3#
- 1...Rh3
- 2.Kxh3#
- 1...Qa4
- Tries
- 1.Sd3?
- threat
- 2.Kf3#
- 2.Kg3#
- 2.Kh3#
- 2.Qe3#
- 2.Qe4#
- 1...Qf5+
- 2.Kxf5#
- 1...Qg5+
- 2.Kxg5#
- 1...Qh5+
- 2.Kxh5#
- 1...Qxc6
- 2.Qe3#
- 2.Qe5#
- 1...Rxc2
- 2.Qe3#
- 2.Qe4#
- 1...Bxf2
- 2.Bxf2#
- 2.Qe4#
- 1...cxd3
- 2.Kf3#
- 2.Kg3#
- 2.Kh3#
- 1...Qd5
- 2.Rxd5#
- 2.Qe3#
- 1...Qe5
- 2.Qxe5#
- 1...Rxd3!
- threat
- 1.Sbd5?
- threat
- 2.Kf5#
- 2.Kg5#
- 2.Kh5#
- 1...Rg3+
- 2.Kxg3#
- 1...Qxd5
- 2.Rxd5#
- 1...Rxc2
- 2.Qe3#
- 1...Re3
- 2.Qxe3#
- 1...Rf3
- 2.Kxf3#
- 1...Rh3
- 2.Kxh3#
- 1...Bxf2!
- threat
- 1.Sa6?
- threat
- 2.Qe4#
- 1...Qf5+
- 2.Kxf5#
- 1...Qg5+
- 2.Kxg5#
- 1...Qh5+
- 2.Kxh5#
- 1...Rg3+
- 2.Kxg3#
- 1...Qxc6
- 2.Qe5#
- 1...Qd5
- 2.Rxd5#
- 1...Qe5
- 2.Qxe5#
- 1...Re3
- 2.Qxe3#
- 1...Rxa6!
- threat
- 1.Sd7?
- threat
- 2.Qe4#
- 1...Qf5+
- 2.Kxf5#
- 1...Qg5+
- 2.Kxg5#
- 1...Qh5+
- 2.Kxh5#
- 1...Rg3+
- 2.Kxg3#
- 1...Qxc6
- 2.Qe5#
- 1...Rxc2
- 2.Kf3#
- 2.Kg3#
- 2.Kh3#
- 2.Qe3#
- 1...Qd5
- 2.Rxd5#
- 1...Qe5
- 2.Qxe5#
- 1...Re3
- 2.Qxe3#
- 1...Rd3!
- threat
- 1.Bxc3+?
- 1...Sxc3
- 2.Qe3#
- 1...Kxc3!
- 1...Sxc3
- 1.Bf5?
- threat
- 2.Kg5#
- 2.Kh5#
- 1...Qxf5+
- 2.Kxf5#
- 1...Rg3+
- 2.Kxg3#
- 1...Qxc6
- 2.Qe5#
- 1...Qd5
- 2.Rxd5#
- 1...Qe5
- 2.Qxe5#
- 1...Re3
- 2.Sc2#
- 2.Qxe3#
- 1...Rf3
- 2.Kxf3#
- 2.Sc2#
- 1...Rh3
- 2.Kxh3#
- 2.Sc2#
- 1...Bxf2!
- threat
- 1.Rxb5?
- threat
- 2.Kf5#
- 2.Kg5#
- 2.Kh5#
- 2.Rd5#
- 2.Qc5#
- 2.Qd8#
- 2.Qe4#
- 2.Qe5#
- 2.Qd7#
- 1...Rg3+
- 2.Kxg3#
- 1...Rxc6
- 2.Kf5#
- 2.Kg5#
- 2.Kh5#
- 2.Sxc6#
- 2.Rd5#
- 2.Qe4#
- 2.Qe5#
- 1...Bxf2
- 2.Rd5#
- 2.Qc5#
- 2.Qe4#
- 2.Qe5#
- 1...Sxb4
- 2.Kf5#
- 2.Kg5#
- 2.Kh5#
- 2.Qc5#
- 2.Qe4#
- 2.Qe5#
- 1...Re3
- 2.Rd5#
- 2.Qc5#
- 2.Qd8#
- 2.Qxe3#
- 2.Qd7#
- 1...Rf3
- 2.Kxf3#
- 2.Rd5#
- 2.Qc5#
- 2.Qd8#
- 2.Qe4#
- 2.Qe5#
- 2.Qd7#
- 1...Rh3
- 2.Kxh3#
- 2.Rd5#
- 2.Qc5#
- 2.Qd8#
- 2.Qe4#
- 2.Qe5#
- 2.Qd7#
- 1...Rb8
- 2.Kf5#
- 2.Kg5#
- 2.Kh5#
- 2.Rd5#
- 2.Qc5#
- 2.Qe4#
- 2.Qe5#
- 2.Qd7#
- 1...Rxb5!
- threat
- 1.Qd6+?
- 1...Qd5
- 2.Rxd5#
- 2.Qxd5#
- 1...cxd6!
- 1...Qd5
- 1.Sd3?
- Keys
- 1.Bd3!
- threat
- 2.Kf3#
- 2.Kg3#
- 2.Kh3#
- 2.Qe3#
- 1...Qf5+
- 2.Kxf5#
- 1...Qg5+
- 2.Kxg5#
- 1...Qh5+
- 2.Kxh5#
- 1...Qxc6
- 2.Qe3#
- 2.Qe5#
- 1...Qxb4
- 2.Rd5#
- 2.Qe3#
- 2.Qe4#
- 1...Rxd3
- 2.Sc2#
- 1...Bxf2
- 2.Bxf2#
- 1...Sxb4
- 2.Qe3#
- 1...cxd3
- 2.Kf3#
- 2.Kg3#
- 2.Kh3#
- 1...Qd5
- 2.Rxd5#
- 2.Qe3#
- 1...Qe5
- 2.Qxe5#
- threat
- 1.Bd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 6
- Sets
- Q(j);N_GUARD,XP(H)::QAB1(J)
- Q(j);OGATE::R1(G),XQ(j)
- Q(j);N_GUARD::QAB1(J),XQ(j)
- Q(j);CHECK::R(F)+K(E),XQ(j)
- R(g);N_GUARD::QAB1(J),XR(g)
- R(g);::R(F)+K(E),XR(g)
- R(g);CHECK::R(F)+K(E),XR(g)
- Tries
- Try
- S(D);
- Threat
- DUALS(5)
- Vars
- Q(j);CHECK::R(F)+K(E),XQ(j)
- Q(j);N_GUARD::QAB1(J),XQ(j)
- Refutation
- R(g);XS(D)
- Try
- S(D);
- Threat
- DUALS(3)
- Vars
- R(g);CHECK::R(F)+K(E),XR(g)
- Q(j);OGATE,XS(D)::R1(G),XQ(j)
- R(g);N_GUARD,XB(B)::QAB1(J)
- R(g);N_GUARD::QAB1(J),XR(g)
- R(g);::R(F)+K(E),XR(g)
- Refutation
- B(a);XP(C)
- Try
- S(D);
- Threat
- QAR1(J)
- Vars
- Q(j);CHECK::R(F)+K(E),XQ(j)
- R(g);CHECK::R(F)+K(E),XR(g)
- Q(j);N_GUARD,XP(H)::QAB1(J)
- Q(j);OGATE::R1(G),XQ(j)
- Q(j);N_GUARD::QAB1(J),XQ(j)
- R(g);N_GUARD::QAB1(J),XR(g)
- Refutation
- R(k);XS(D)
- Try
- S(I);
- Threat
- QAR1(J)
- Vars
- Q(j);CHECK::R(F)+K(E),XQ(j)
- R(g);CHECK::R(F)+K(E),XR(g)
- Q(j);N_GUARD,XP(H)::QAB1(J)
- Q(j);OGATE::R1(G),XQ(j)
- Q(j);N_GUARD::QAB1(J),XQ(j)
- R(g);N_GUARD::QAB1(J),XR(g)
- Refutation
- R(g);
- Try
- B(A);CHECK,XR(g)
- Vars
- S(c);XB(A)::QAB1(J)
- Refutation
- K(i);S_FLIGHT,XB(A)
- Try
- B(B);
- Threat
- DUALS(2)
- Vars
- Q(j);CHECK,XB(B)::R(F)+K(E),XQ(j)
- R(g);CHECK::R(F)+K(E),XR(g)
- Q(j);N_GUARD,XP(H)::QAB1(J)
- Q(j);OGATE::R1(G),XQ(j)
- Q(j);N_GUARD::QAB1(J),XQ(j)
- Refutation
- B(a);XP(C)
- Try
- R(G);XQ(j)
- Threat
- DUALS(9)
- Vars
- R(g);CHECK::R(F)+K(E),XR(g)
- Refutation
- R(k);XR(G)
- Try
- Q(J);CHECK
- Refutation
- P(l);XQ(J)
- Try
- Actual
- B(B);
- Threat
- DUALS(4)
- Vars
- Q(j);CHECK::R(F)+K(E),XQ(j)
- R(g);N_GUARD,SBLOCK,XB(B)::S(D)
- B(a);OGATE,XP(C)::B(A),XB(a)
- S(c);XS(D)::QAB1(J)
- Q(j);N_GUARD::QAB1(J),XQ(j)
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).