MESON Chess Problem Database
Problem Display
PID: 262845 (1r1r1N2/PPP5/7R/p2kN1Kp/P4Pp1/B1P3p1/8/1QnB4 w - - 0 1)
Kopaev, Viacheslav Georgievich
Szachy, 1978
#2
13 + 8
| 6490 | yacpdb | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Rxb7
- 2.Qxb7#
- 1...Rd6
- 2.Rxd6#
- 1...Rc8
- 2.Rd6#
- 1...Re8
- 2.Rd6#
- 1...Rxf8
- 2.Rd6#
- 1...Sa2
- 2.Bb3#
- 2.Qd3#
- 1...Se2
- 2.Bb3#
- 1...Sb3
- 2.Bxb3#
- 1...Sd3
- 2.Qxd3#
- 1...Rxb7
- Tries
- 1.Kf5?
- threat
- 2.Qe4#
- 2.Qb5#
- 1...Rxb7
- 2.Qe4#
- 2.Qxb7#
- 1...Sb3
- 2.Bxb3#
- 2.Qe4#
- 2.Qxb3#
- 1...Sd3
- 2.Bb3#
- 2.Qa2#
- 2.Qxd3#
- 2.Qb3#
- 1...Rxf8+!
- threat
- 1.Se6?
- threat
- 2.c4#
- 1...Sd3
- 2.Qxd3#
- 1...Rg8+!
- threat
- 1.Bc2?
- threat
- 2.Be4#
- 2.Qb5#
- 1...Rxb7
- 2.Be4#
- 2.Qxb7#
- 1...Sb3
- 2.Bxb3#
- 2.Be4#
- 2.Qxb3#
- 1...Sd3!
- threat
- 1.Be2?
- threat
- 2.Bc4#
- 1...Sd3
- 2.Qxd3#
- 1...Sxe2!
- threat
- 1.Bxg4?
- threat
- 2.Bf3#
- 2.Be6#
- 1...Sd3
- 2.Bf3#
- 2.Qxd3#
- 1...Rd6
- 2.Bf3#
- 2.Rxd6#
- 1...Re8
- 2.Bf3#
- 2.Rd6#
- 1...hxg4!
- threat
- 1.Rb6?
- threat
- 2.Rb5#
- 1...Rxf8
- 2.Rd6#
- 1...Sd3
- 2.Qxd3#
- 1...Sb3
- 2.Bxb3#
- 1...Rxb7!
- threat
- 1.Qc2?
- threat
- 2.Qg2#
- 1...g2
- 2.Qxg2#
- 1...Se2!
- threat
- 1.Qb4?
- threat
- 2.Qc4#
- 2.Qd4#
- 1...Se2
- 2.Bb3#
- 2.Qc4#
- 1...Sb3
- 2.Bxb3#
- 2.Qc4#
- 1...axb4!
- threat
- 1.Qb6?
- threat
- 2.Qd4#
- 2.Qc6#
- 1...Rd6
- 2.Qd4#
- 1...Se2
- 2.Qc6#
- 1...Sb3
- 2.Qc6#
- 1...Ke4!
- threat
- 1.axb8Q?
- threat
- 2.Qxd8#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Rxb8
- 2.Rd6#
- 1...Rxf8
- 2.Rd6#
- 1...Sd3
- 2.Qxd3#
- 1...Rd6
- 2.Rxd6#
- 1...Rc8
- 2.Rd6#
- 1...Re8
- 2.Rd6#
- 1...Sa2
- 2.Bb3#
- 2.Qd3#
- 2.Qxd8#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Se2
- 2.Bb3#
- 2.Qxd8#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Sb3
- 2.Bxb3#
- 2.Qxd8#
- 2.cxd8Q#
- 2.cxd8R#
- 1...g2
- 2.Qxd8#
- 2.cxd8Q#
- 2.cxd8R#
- 1...h4
- 2.Qxd8#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Rd7!
- threat
- 1.axb8S?
- threat
- 2.cxd8Q#
- 2.cxd8R#
- 1...Rxb8
- 2.Rd6#
- 1...Rxf8
- 2.Rd6#
- 1...Sd3
- 2.Qxd3#
- 1...Rd6
- 2.Rxd6#
- 1...Rc8
- 2.Rd6#
- 1...Re8
- 2.Rd6#
- 1...Sa2
- 2.Bb3#
- 2.Qd3#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Se2
- 2.Bb3#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Sb3
- 2.Bxb3#
- 2.cxd8Q#
- 2.cxd8R#
- 1...g2
- 2.cxd8Q#
- 2.cxd8R#
- 1...h4
- 2.cxd8Q#
- 2.cxd8R#
- 1...Rd7!
- threat
- 1.axb8B?
- threat
- 2.cxd8Q#
- 2.cxd8R#
- 1...Rxb8
- 2.Rd6#
- 1...Rxf8
- 2.Rd6#
- 1...Sd3
- 2.Qxd3#
- 1...Rd6
- 2.Rxd6#
- 1...Rc8
- 2.Rd6#
- 1...Re8
- 2.Rd6#
- 1...Sa2
- 2.Bb3#
- 2.Qd3#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Se2
- 2.Bb3#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Sb3
- 2.Bxb3#
- 2.cxd8Q#
- 2.cxd8R#
- 1...g2
- 2.cxd8Q#
- 2.cxd8R#
- 1...h4
- 2.cxd8Q#
- 2.cxd8R#
- 1...Rd7!
- threat
- 1.axb8R?
- threat
- 2.Rxd8#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Rxb8
- 2.Rd6#
- 1...Rxf8
- 2.Rd6#
- 1...Sd3
- 2.Qxd3#
- 1...Rd6
- 2.Rxd6#
- 1...Rc8
- 2.Rd6#
- 1...Re8
- 2.Rd6#
- 1...Sa2
- 2.Bb3#
- 2.Rxd8#
- 2.Qd3#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Se2
- 2.Bb3#
- 2.Rxd8#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Sb3
- 2.Bxb3#
- 2.Rxd8#
- 2.cxd8Q#
- 2.cxd8R#
- 1...g2
- 2.Rxd8#
- 2.cxd8Q#
- 2.cxd8R#
- 1...h4
- 2.Rxd8#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Rd7!
- threat
- 1.a8Q?
- threat
- 2.Qxa5#
- 1...Rxb7
- 2.Qaxb7#
- 2.Qbxb7#
- 2.Qxd8#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Sd3
- 2.Qxd3#
- 1...Sb3
- 2.Bxb3#
- 1...Rxa8!
- threat
- 1.a8S?
- threat
- 2.Sb6#
- 1...Rxb7
- 2.Qxb7#
- 1...Sd3
- 2.Qxd3#
- 1...Rd6
- 2.Rxd6#
- 1...Rxa8!
- threat
- 1.a8R?
- threat
- 2.Rxa5#
- 1...Rxb7
- 2.Rxd8#
- 2.Qxb7#
- 1...Sd3
- 2.Qxd3#
- 1...Sb3
- 2.Bxb3#
- 1...Rxa8!
- threat
- 1.cxb8Q?
- threat
- 2.Qxd8#
- 1...Rxb8
- 2.Rd6#
- 1...Rxf8
- 2.Rd6#
- 2.Qd6#
- 1...Sd3
- 2.Qxd3#
- 1...Rd6
- 2.Rxd6#
- 2.Qxd6#
- 1...Rc8
- 2.Rd6#
- 2.Qd6#
- 1...Re8
- 2.Rd6#
- 2.Qd6#
- 1...Rd7!
- threat
- 1.cxb8R?
- threat
- 2.Rxd8#
- 1...Rxb8
- 2.Rd6#
- 1...Rxf8
- 2.Rd6#
- 1...Sd3
- 2.Qxd3#
- 1...Rd6
- 2.Rxd6#
- 1...Rc8
- 2.Rd6#
- 1...Re8
- 2.Rd6#
- 1...Rd7!
- threat
- 1.cxd8S?
- threat
- 2.Rd6#
- 1...Sd3
- 2.Qxd3#
- 1...Rxd8!
- threat
- 1.cxd8B?
- threat
- 2.Rd6#
- 1...Sd3
- 2.Qxd3#
- 1...Rxd8!
- threat
- 1.c8Q?
- threat
- 2.Qe6#
- 2.Qc4#
- 2.Qc5#
- 2.Qc6#
- 1...Rdxc8
- 2.Rd6#
- 1...Sd3
- 2.Qxd3#
- 2.Qc4#
- 2.Qc6#
- 1...Rd6
- 2.Rxd6#
- 2.Qc4#
- 2.Qc5#
- 1...Rd7
- 2.Qxd7#
- 2.Qc4#
- 2.Qc5#
- 2.Qc6#
- 1...Re8
- 2.Rd6#
- 2.Qd7#
- 2.Qc4#
- 2.Qc5#
- 2.Qc6#
- 1...Sb3
- 2.Bxb3#
- 2.Qe6#
- 2.Qc4#
- 2.Qc6#
- 1...Rbxc8!
- threat
- 1.c8S?
- threat
- 2.Sb6#
- 2.Se7#
- 1...Rxb7
- 2.Qxb7#
- 1...Rdxc8
- 2.Rd6#
- 1...Sd3
- 2.Qxd3#
- 1...Rd6
- 2.Se7#
- 2.Rxd6#
- 1...Rd7
- 2.Sb6#
- 1...Re8
- 2.Sb6#
- 2.Rd6#
- 1...Rbxc8!
- threat
- 1.c8R?
- threat
- 2.Rc5#
- 1...Rdxc8
- 2.Rd6#
- 1...Sd3
- 2.Qxd3#
- 1...Sb3
- 2.Bxb3#
- 1...Rbxc8!
- threat
- 1.Kf5?
- Keys
- 1.Ra6!
- threat
- 2.Rxa5#
- 1...Rxb7
- 2.Qxb7#
- 1...Rxf8
- 2.Rd6#
- 1...Sd3
- 2.Qxd3#
- 1...Sb3
- 2.Bxb3#
- threat
- 1.Ra6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 4
- Sets
- R(g);OGATE,XP(K)::QAB(A),XR(g)
- R(h);N_GUARD::R1(I),XR(h)
- R(h);N_GUARD::R1(I)
- R(h);N_GUARD,XS(M)::R1(I)
- S(a);N_GUARD::B(B)
- S(a);N_GUARD::B(B),XS(a)
- S(a);N_GUARD::QAR2(A),XS(a)
- Tries
- Try
- K(H);P-FLIGHT
- Threat
- DUALS(2)
- Refutation
- R(h);CHECK,XS(M)
- Try
- S(M);
- Threat
- P(D)
- Vars
- S(a);N_GUARD::QAR2(A),XS(a)
- Refutation
- R(h);CHECK
- Try
- B(B);
- Threat
- DUALS(2)
- Refutation
- S(a);
- Try
- B(B);
- Threat
- B(B)
- Vars
- S(a);N_GUARD::QAR2(A),XS(a)
- Refutation
- S(a);XB(B)
- Try
- B(B);XP(c)
- Threat
- DUALS(2)
- Refutation
- P(f);XB(B)
- Try
- R(I);
- Threat
- R(I)
- Vars
- R(h);N_GUARD,XS(M)::R1(I)
- S(a);N_GUARD::QAR2(A),XS(a)
- S(a);N_GUARD::B(B),XS(a)
- Refutation
- R(g);XP(K)
- Try
- Q(A);
- Threat
- QAB(A)
- Vars
- P(b);::QAB(A),XP(b)
- Refutation
- S(a);
- Try
- Q(A);
- Threat
- DUALS(2)
- Refutation
- P(d);XQ(A)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- R(h);::QAR1(A)
- S(a);::QAB1(A)
- Refutation
- K(e);S_FLIGHT
- Try
- P(J);XR(g)
- Threat
- DUALS(3)
- Vars
- R(h);N_GUARD,XQ(J)::R1(I)
- R(h);N_GUARD,XS(M)::R1(I)
- S(a);N_GUARD::QAR2(A),XS(a)
- R(h);N_GUARD::R1(I),XR(h)
- R(h);N_GUARD::R1(I)
- Refutation
- R(h);
- Try
- P(J);XR(g)
- Threat
- PXR(h)=Q
- Vars
- R(h);N_GUARD,XS(J)::R1(I)
- R(h);N_GUARD,XS(M)::R1(I)
- S(a);N_GUARD::QAR2(A),XS(a)
- R(h);N_GUARD::R1(I),XR(h)
- R(h);N_GUARD::R1(I)
- P(b);::PXR(h)=Q
- P(f);::PXR(h)=Q
- Refutation
- R(h);
- Try
- P(J);XR(g)
- Threat
- PXR(h)=Q
- Vars
- R(h);N_GUARD,XB(J)::R1(I)
- R(h);N_GUARD,XS(M)::R1(I)
- S(a);N_GUARD::QAR2(A),XS(a)
- R(h);N_GUARD::R1(I),XR(h)
- R(h);N_GUARD::R1(I)
- P(b);::PXR(h)=Q
- P(f);::PXR(h)=Q
- Refutation
- R(h);
- Try
- P(J);XR(g)
- Threat
- DUALS(3)
- Vars
- R(h);N_GUARD,XR(J)::R1(I)
- R(h);N_GUARD,XS(M)::R1(I)
- S(a);N_GUARD::QAR2(A),XS(a)
- R(h);N_GUARD::R1(I),XR(h)
- R(h);N_GUARD::R1(I)
- Refutation
- R(h);
- Try
- P(J);
- Threat
- QAR(J),XP(d)
- Vars
- S(a);N_GUARD::QAR2(A),XS(a)
- S(a);N_GUARD::B(B),XS(a)
- Refutation
- R(g);XQ(J)
- Try
- P(J);
- Threat
- S(J)
- Vars
- R(g);OGATE,XP(K)::QAB(A),XR(g)
- S(a);N_GUARD::QAR2(A),XS(a)
- R(h);N_GUARD::R1(I),XR(h)
- Refutation
- R(g);XS(J)
- Try
- P(J);
- Threat
- R(J),XP(d)
- Vars
- S(a);N_GUARD::QAR2(A),XS(a)
- S(a);N_GUARD::B(B),XS(a)
- Refutation
- R(g);XR(J)
- Try
- P(L);XR(g)
- Threat
- QAR(L),XR(h)
- Vars
- R(h);N_GUARD,XQ(L)::R1(I)
- S(a);N_GUARD::QAR2(A),XS(a)
- Refutation
- R(h);
- Try
- P(L);XR(g)
- Threat
- R(L),XR(h)
- Vars
- R(h);N_GUARD,XR(L)::R1(I)
- R(h);N_GUARD,XS(M)::R1(I)
- S(a);N_GUARD::QAR2(A),XS(a)
- R(h);N_GUARD::R1(I),XR(h)
- R(h);N_GUARD::R1(I)
- Refutation
- R(h);
- Try
- P(L);XR(h)
- Threat
- R1(I)
- Vars
- S(a);N_GUARD::QAR2(A),XS(a)
- Refutation
- R(g);XS(L)
- Try
- P(L);XR(h)
- Threat
- R1(I)
- Vars
- S(a);N_GUARD::QAR2(A),XS(a)
- Refutation
- R(g);XB(L)
- Try
- P(L);
- Threat
- DUALS(4)
- Vars
- R(h);N_GUARD,XQ(L)::R1(I)
- Refutation
- R(g);XQ(L)
- Try
- P(L);
- Threat
- DUALS(2)
- Vars
- R(g);OGATE,XP(K)::QAB(A),XR(g)
- R(h);N_GUARD,XS(L)::R1(I)
- S(a);N_GUARD::QAR2(A),XS(a)
- R(h);::S(L)
- Refutation
- R(g);XS(L)
- Try
- P(L);
- Threat
- R1(L)
- Vars
- R(h);N_GUARD,XR(L)::R1(I)
- S(a);N_GUARD::QAR2(A),XS(a)
- S(a);N_GUARD::B(B),XS(a)
- Refutation
- R(g);XR(L)
- Try
- Actual
- R(I);
- Threat
- R(I),XP(d)
- Vars
- R(g);OGATE,XP(K)::QAB(A),XR(g)
- R(h);N_GUARD,XS(M)::R1(I)
- S(a);N_GUARD::QAR2(A),XS(a)
- S(a);N_GUARD::B(B),XS(a)
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).