MESON Chess Problem Database
Problem Display
PID: 140296 (2RQ2BK/4B1p1/3pq1N1/1r1k1n1n/2pP4/2p2P2/2P5/3R4 w - - 0 1)
Umnov, Evgeny Ivanovich
Shakhmaty v SSSR, 1949
#2
10 + 9
SOLUTION
- SOUND
- Sets
- 1...Qf7
- 2.Bxf7#
- 1...Qxg8+
- 2.Qxg8#
- 1...Rb1
- 2.Rc5#
- 1...Rb2
- 2.Rc5#
- 1...Rb3
- 2.Rc5#
- 1...Rb4
- 2.Rc5#
- 1...Ra5
- 2.Qxa5#
- 1...Rc5
- 2.Rxc5#
- 1...Rb6
- 2.Rc5#
- 1...Rb7
- 2.Rc5#
- 1...Rb8
- 2.Rc5#
- 1...Se3
- 2.Qxd6#
- 1...Sfg3
- 2.Qxd6#
- 1...Sxd4
- 2.Qxd6#
- 1...Sh4
- 2.Qxd6#
- 1...Sh6
- 2.Qxd6#
- 1...Sxe7
- 2.Sxe7#
- 1...Shg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sf6
- 2.Sf4#
- 1...Qf7
- Tries
- 1.Kh7?
- 1...Qxg8+
- 2.Qxg8#
- 1...Sxd4
- 2.Qxd6#
- 1...Sxe7
- 2.Sxe7#
- 1...Qf7
- 2.Bxf7#
- 1...Rb1
- 2.Rc5#
- 1...Rb2
- 2.Rc5#
- 1...Rb3
- 2.Rc5#
- 1...Rb4
- 2.Rc5#
- 1...Ra5
- 2.Qxa5#
- 1...Rc5
- 2.Rxc5#
- 1...Rb6
- 2.Rc5#
- 1...Rb7
- 2.Rc5#
- 1...Rb8
- 2.Rc5#
- 1...Se3
- 2.Qxd6#
- 1...Sfg3
- 2.Qxd6#
- 1...Sh4
- 2.Qxd6#
- 1...Sh6
- 2.Qxd6#
- 1...Shg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sf6+!
- 1...Qxg8+
- 1.Bg5?
- 1...Qxg8+
- 2.Qxg8#
- 1...Qf7
- 2.Bxf7#
- 1...Shg3
- 2.Sf4#
- 1...Rb1
- 2.Rc5#
- 1...Rb2
- 2.Rc5#
- 1...Rb3
- 2.Rc5#
- 1...Rb4
- 2.Rc5#
- 1...Ra5
- 2.Qxa5#
- 1...Rc5
- 2.Rxc5#
- 1...Rb6
- 2.Rc5#
- 1...Rb7
- 2.Rc5#
- 1...Rb8
- 2.Rc5#
- 1...Se3
- 2.Se7#
- 1...Sfg3
- 2.Se7#
- 1...Sh4
- 2.Se7#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...Sf4
- 2.Sxf4#
- 1...Sf6
- 2.Sf4#
- 1...Sxd4!
- 1...Qxg8+
- 1.Bf6?
- 1...Qxg8+
- 2.Qxg8#
- 1...Sxd4
- 2.Se7#
- 2.Rxd4#
- 1...Sxf6
- 2.Sf4#
- 1...Qf7
- 2.Bxf7#
- 1...Shg3
- 2.Sf4#
- 1...Rb1
- 2.Rc5#
- 1...Rb2
- 2.Rc5#
- 1...Rb3
- 2.Rc5#
- 1...Rb4
- 2.Rc5#
- 1...Ra5
- 2.Qxa5#
- 1...Rc5
- 2.Rxc5#
- 1...Rb6
- 2.Rc5#
- 1...Rb7
- 2.Rc5#
- 1...Rb8
- 2.Rc5#
- 1...Se3
- 2.Se7#
- 1...Sfg3
- 2.Se7#
- 1...Sh4
- 2.Se7#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...Sf4
- 2.Sxf4#
- 1...gxf6!
- 1...Qxg8+
- 1.Bf8?
- 1...Sxd4
- 2.Qg5#
- 2.Qxd6#
- 1...Qf7
- 2.Bxf7#
- 1...Shg3
- 2.Sf4#
- 1...Rb1
- 2.Rc5#
- 1...Rb2
- 2.Rc5#
- 1...Rb3
- 2.Rc5#
- 1...Rb4
- 2.Rc5#
- 1...Ra5
- 2.Qxa5#
- 1...Rc5
- 2.Rxc5#
- 1...Rb6
- 2.Rc5#
- 1...Rb7
- 2.Rc5#
- 1...Rb8
- 2.Rc5#
- 1...Se3
- 2.Se7#
- 2.Qxd6#
- 1...Sfg3
- 2.Se7#
- 2.Qxd6#
- 1...Sh4
- 2.Se7#
- 2.Qxd6#
- 1...Sh6
- 2.Se7#
- 2.Qxd6#
- 1...Se7
- 2.Sxe7#
- 1...Sf4
- 2.Sxf4#
- 1...Sf6
- 2.Sf4#
- 1...Qxg8+!
- 1...Sxd4
- 1.Bf7?
- 1...Sxd4
- 2.Qxd6#
- 1...Sxe7
- 2.Sxe7#
- 1...Shg3
- 2.Sf4#
- 1...Rb1
- 2.Rc5#
- 1...Rb2
- 2.Rc5#
- 1...Rb3
- 2.Rc5#
- 1...Rb4
- 2.Rc5#
- 1...Ra5
- 2.Qxa5#
- 1...Rc5
- 2.Rxc5#
- 1...Rb6
- 2.Rc5#
- 1...Rb7
- 2.Rc5#
- 1...Rb8
- 2.Rc5#
- 1...Se3
- 2.Qxd6#
- 1...Sfg3
- 2.Qxd6#
- 1...Sh4
- 2.Qxd6#
- 1...Sh6
- 2.Qxd6#
- 1...Sf4
- 2.Sxf4#
- 1...Sf6
- 2.Sf4#
- 1...Qxf7!
- 1...Sxd4
- 1.Rd2?
- 1...Qxg8+
- 2.Qxg8#
- 1...Sxd4
- 2.Qxd6#
- 1...Sxe7
- 2.Sxe7#
- 1...Qf7
- 2.Bxf7#
- 1...Shg3
- 2.Sf4#
- 1...Rb1
- 2.Rc5#
- 1...Rb2
- 2.Rc5#
- 1...Rb3
- 2.Rc5#
- 1...Rb4
- 2.Rc5#
- 1...Ra5
- 2.Qxa5#
- 1...Rc5
- 2.Rxc5#
- 1...Rb6
- 2.Rc5#
- 1...Rb7
- 2.Rc5#
- 1...Rb8
- 2.Rc5#
- 1...Se3
- 2.Qxd6#
- 1...Sfg3
- 2.Qxd6#
- 1...Sh4
- 2.Qxd6#
- 1...Sh6
- 2.Qxd6#
- 1...Sf4
- 2.Sxf4#
- 1...Sf6
- 2.Sf4#
- 1...cxd2!
- 1...Qxg8+
- 1.Rd3?
- 1...Qxg8+
- 2.Qxg8#
- 1...Sxd4
- 2.Qxd6#
- 1...Sxe7
- 2.Sxe7#
- 1...Qf7
- 2.Bxf7#
- 1...Shg3
- 2.Sf4#
- 1...Rb1
- 2.Rc5#
- 1...Rb2
- 2.Rc5#
- 1...Rb3
- 2.Rc5#
- 1...Rb4
- 2.Rc5#
- 1...Ra5
- 2.Qxa5#
- 1...Rc5
- 2.Rxc5#
- 1...Rb6
- 2.Rc5#
- 1...Rb7
- 2.Rc5#
- 1...Rb8
- 2.Rc5#
- 1...Se3
- 2.Qxd6#
- 1...Sfg3
- 2.Qxd6#
- 1...Sh4
- 2.Qxd6#
- 1...Sh6
- 2.Qxd6#
- 1...Sf4
- 2.Sxf4#
- 1...Sf6
- 2.Sf4#
- 1...cxd3!
- 1...Qxg8+
- 1.Rc7?
- 1...Qxg8+
- 2.Qxg8#
- 1...Sxd4
- 2.Qxd6#
- 1...Sxe7
- 2.Sxe7#
- 1...Qf7
- 2.Bxf7#
- 1...Shg3
- 2.Sf4#
- 1...Rb1
- 2.Rc5#
- 1...Rb2
- 2.Rc5#
- 1...Rb3
- 2.Rc5#
- 1...Rb4
- 2.Rc5#
- 1...Rc5
- 2.Rxc5#
- 1...Rb6
- 2.Rc5#
- 1...Rb7
- 2.Rc5#
- 1...Rb8
- 2.Rc5#
- 1...Se3
- 2.Qxd6#
- 1...Sfg3
- 2.Qxd6#
- 1...Sh4
- 2.Qxd6#
- 1...Sh6
- 2.Qxd6#
- 1...Sf4
- 2.Sxf4#
- 1...Sf6
- 2.Sf4#
- 1...Ra5!
- 1...Qxg8+
- 1.Qd7?
- threat
- 2.Bxe6#
- 2.Qxb5#
- 2.Qc6#
- 2.Qxe6#
- 1...Sxe7
- 2.Sxe7#
- 2.Bxe6#
- 2.Qxb5#
- 2.Qxe6#
- 1...Qf7
- 2.Bxf7#
- 2.Qxf5#
- 1...Rb1
- 2.Bxe6#
- 2.Rc5#
- 2.Qc6#
- 2.Qxe6#
- 1...Rb2
- 2.Bxe6#
- 2.Rc5#
- 2.Qc6#
- 2.Qxe6#
- 1...Rb3
- 2.Bxe6#
- 2.Rc5#
- 2.Qc6#
- 2.Qxe6#
- 1...Rb4
- 2.Bxe6#
- 2.Rc5#
- 2.Qc6#
- 2.Qxe6#
- 1...Ra5
- 2.Bxe6#
- 2.Qc6#
- 2.Qxe6#
- 2.Qb7#
- 1...Rc5
- 2.Bxe6#
- 2.Rxc5#
- 2.Qxe6#
- 1...Rb6
- 2.Bxe6#
- 2.Rc5#
- 2.Qxe6#
- 1...Rb7
- 2.Bxe6#
- 2.Rc5#
- 2.Qc6#
- 2.Qxe6#
- 2.Qxb7#
- 1...Rb8
- 2.Bxe6#
- 2.Rc5#
- 2.Qc6#
- 2.Qxe6#
- 1...Sf4
- 2.Sxf4#
- 2.Qxb5#
- 2.Qc6#
- 1...Qxg8+!
- threat
- 1.Kh7?
- Keys
- 1.Bh4!
- 1...Qxg8+
- 2.Qxg8#
- 1...Sxd4
- 2.Qg5#
- 1...Sxh4
- 2.Se7#
- 1...Qf7
- 2.Bxf7#
- 1...Shg3
- 2.Sf4#
- 1...Rb1
- 2.Rc5#
- 1...Rb2
- 2.Rc5#
- 1...Rb3
- 2.Rc5#
- 1...Rb4
- 2.Rc5#
- 1...Ra5
- 2.Qxa5#
- 1...Rc5
- 2.Rxc5#
- 1...Rb6
- 2.Rc5#
- 1...Rb7
- 2.Rc5#
- 1...Rb8
- 2.Rc5#
- 1...Se3
- 2.Se7#
- 1...Sfg3
- 2.Se7#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...Sf4
- 2.Sxf4#
- 1...Sf6
- 2.Sf4#
- 1...Qxg8+
- 1.Bh4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 5
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- Q(h);OGATEB::B(I),XQ(h)
- Q(h);CHECK,N_SPINQ(h),OGATE,XB(I)::QAB(H),XQ(h)
- R(c);N_GUARD::R1(G)
- R(c);OGATEB::QAR(H),XR(c)
- R(c);N_GUARD::R1(G),XR(c)
- S(e);N_GUARD::QAR1(H),XP(g)
- S(e);N_GUARD,P_SPINS(e),XP(D)::QAR1(H),XP(g)
- S(e);XB(F)::S(E),XS(e)
- S(f);N_GUARD::S(E)
- S(f);N_GUARD::S(E),XS(f)
- Tries
- Try
- K(J);P-FLIGHT
- Vars
- Q(h);CHECK,N_SPINQ(h),OGATE,XB(I)::QAB(H),XQ(h)
- S(e);N_GUARD,P_SPINS(e),XP(D)::QAR1(H),XP(g)
- S(e);XB(F)::S(E),XS(e)
- Q(h);OGATEB::B(I),XQ(h)
- R(c);N_GUARD::R1(G)
- R(c);OGATEB::QAR(H),XR(c)
- R(c);N_GUARD::R1(G),XR(c)
- S(e);N_GUARD::QAR1(H),XP(g)
- S(f);N_GUARD::S(E)
- S(f);N_GUARD::S(E),XS(f)
- Refutation
- S(f);CHECK
- Try
- B(F);
- Vars
- Q(h);CHECK,N_SPINQ(h),OGATE,XB(I)::QAB(H),XQ(h)
- Q(h);OGATEB::B(I),XQ(h)
- S(f);N_GUARD::S(E)
- R(c);N_GUARD::R1(G)
- R(c);OGATEB::QAR(H),XR(c)
- R(c);N_GUARD::R1(G),XR(c)
- S(e);N_GUARD::S(E)
- S(e);N_GUARD::S(E),XS(e)
- S(f);N_GUARD::S(E),XS(f)
- Refutation
- S(e);P_SPINS(e),XP(D)
- Try
- B(F);
- Vars
- Q(h);CHECK,N_SPINQ(h),OGATE,XB(I)::QAB(H),XQ(h)
- S(f);N_GUARD,XB(F)::S(E)
- Q(h);OGATEB::B(I),XQ(h)
- S(f);N_GUARD::S(E)
- R(c);N_GUARD::R1(G)
- R(c);OGATEB::QAR(H),XR(c)
- R(c);N_GUARD::R1(G),XR(c)
- S(e);N_GUARD::S(E)
- S(e);N_GUARD::S(E),XS(e)
- S(f);N_GUARD::S(E),XS(f)
- Refutation
- P(i);XB(F)
- Try
- B(F);
- Vars
- Q(h);OGATEB::B(I),XQ(h)
- S(f);N_GUARD::S(E)
- R(c);N_GUARD::R1(G)
- R(c);OGATEB::QAR(H),XR(c)
- R(c);N_GUARD::R1(G),XR(c)
- S(e);N_GUARD::S(E),XS(e)
- S(f);N_GUARD::S(E),XS(f)
- Refutation
- Q(h);CHECK,N_SPINQ(h),XB(I)
- Try
- B(I);
- Vars
- S(e);N_GUARD,P_SPINS(e),XP(D)::QAR1(H),XP(g)
- S(e);XB(F)::S(E),XS(e)
- S(f);N_GUARD::S(E)
- R(c);N_GUARD::R1(G)
- R(c);OGATEB::QAR(H),XR(c)
- R(c);N_GUARD::R1(G),XR(c)
- S(e);N_GUARD::QAR1(H),XP(g)
- S(f);N_GUARD::S(E),XS(f)
- Refutation
- Q(h);N_SPINQ(h),XB(I)
- Try
- R(A);
- Vars
- Q(h);CHECK,N_SPINQ(h),OGATE,XB(I)::QAB(H),XQ(h)
- S(e);N_GUARD,P_SPINS(e),XP(D)::QAR1(H),XP(g)
- S(e);XB(F)::S(E),XS(e)
- Q(h);OGATEB::B(I),XQ(h)
- S(f);N_GUARD::S(E)
- R(c);N_GUARD::R1(G)
- R(c);OGATEB::QAR(H),XR(c)
- R(c);N_GUARD::R1(G),XR(c)
- S(e);N_GUARD::QAR1(H),XP(g)
- S(f);N_GUARD::S(E),XS(f)
- Refutation
- P(a);XR(A)
- Try
- R(A);
- Vars
- Q(h);CHECK,N_SPINQ(h),OGATE,XB(I)::QAB(H),XQ(h)
- S(e);N_GUARD,P_SPINS(e),XP(D)::QAR1(H),XP(g)
- S(e);XB(F)::S(E),XS(e)
- Q(h);OGATEB::B(I),XQ(h)
- S(f);N_GUARD::S(E)
- R(c);N_GUARD::R1(G)
- R(c);OGATEB::QAR(H),XR(c)
- R(c);N_GUARD::R1(G),XR(c)
- S(e);N_GUARD::QAR1(H),XP(g)
- S(f);N_GUARD::S(E),XS(f)
- Refutation
- P(b);XR(A)
- Try
- R(G);
- Vars
- Q(h);CHECK,N_SPINQ(h),OGATE,XB(I)::QAB(H),XQ(h)
- S(e);N_GUARD,P_SPINS(e),XP(D)::QAR1(H),XP(g)
- S(e);XB(F)::S(E),XS(e)
- Q(h);OGATEB::B(I),XQ(h)
- S(f);N_GUARD::S(E)
- R(c);N_GUARD::R1(G)
- R(c);N_GUARD::R1(G),XR(c)
- S(e);N_GUARD::QAR1(H),XP(g)
- S(f);N_GUARD::S(E),XS(f)
- Refutation
- R(c);
- Try
- Q(H);
- Threat
- DUALS(4)
- Refutation
- Q(h);CHECK,N_SPINQ(h),XB(I)
- Try
- Actual
- B(F);
- Vars
- Q(h);CHECK,N_SPINQ(h),OGATE,XB(I)::QAB(H),XQ(h)
- S(e);OGATEB,P_SPINS(e),XP(D)::QAR(H)
- S(e);N_GUARD,XB(F)::S(E)
- Q(h);OGATEB::B(I),XQ(h)
- S(f);N_GUARD::S(E)
- R(c);N_GUARD::R1(G)
- R(c);OGATEB::QAR(H),XR(c)
- R(c);N_GUARD::R1(G),XR(c)
- S(e);N_GUARD::S(E)
- S(e);N_GUARD::S(E),XS(e)
- S(f);N_GUARD::S(E),XS(f)
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).