MESON Chess Problem Database
Problem Display
PID: 208457 (2Rr1b1N/1p1pR1p1/1p1kP1Pn/1P2pPQ1/1K6/2N5/8/2B5 w - - 0 1)
Junker, Karl
Karge, Fritz
Deutsche Schachblatter, 1983
#2
11 + 9
| 15148 | Sadier Collection | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Rxc8
- 2.Rxd7#
- 1...Re8
- 2.Rxd7#
- 1...Bxe7
- 2.Qd2#
- 1...Sg4
- 2.Sf7#
- 1...Sxf5
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Sg8
- 2.Sf7#
- 1...e4
- 2.Bf4#
- 1...dxe6
- 2.Rxd8#
- 1...Rxc8
- Tries
- 1.Kb3?
- threat
- 2.Ba3#
- 1...e4
- 2.Bf4#
- 1...Rxc8!
- threat
- 1.Ka4?
- threat
- 2.Ba3#
- 1...e4
- 2.Bf4#
- 1...Rxc8!
- threat
- 1.Kc4?
- threat
- 2.Se4#
- 2.Ba3#
- 1...e4
- 2.Bf4#
- 1...Rxc8+!
- threat
- 1.Bb2?
- 1...Rxc8
- 2.Rxd7#
- 1...Bxe7
- 2.Qd2#
- 1...Sxf5
- 2.Sf7#
- 1...dxe6
- 2.Rxd8#
- 1...Re8
- 2.Rxd7#
- 1...Sg4
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Sg8
- 2.Sf7#
- 1...e4!
- 1...Rxc8
- 1.Bd2?
- 1...Rxc8
- 2.Rxd7#
- 1...Sxf5
- 2.Sf7#
- 1...dxe6
- 2.Rxd8#
- 1...e4
- 2.Bf4#
- 1...Re8
- 2.Rxd7#
- 1...Sg4
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Sg8
- 2.Sf7#
- 1...Bxe7!
- 1...Rxc8
- 1.Ba3?
- threat
- 2.Kb3#
- 2.Ka4#
- 2.Kc4#
- 1...Rxc8
- 2.Rxd7#
- 1...e4!
- threat
- 1.Be3?
- 1...Rxc8
- 2.Rxd7#
- 1...Sxf5
- 2.Sf7#
- 1...dxe6
- 2.Rxd8#
- 1...e4
- 2.Bf4#
- 1...Re8
- 2.Rxd7#
- 1...Sg4
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Sg8
- 2.Sf7#
- 1...Bxe7!
- 1...Rxc8
- 1.Rf7?
- threat
- 2.Qd2#
- 1...Rxc8
- 2.Rxd7#
- 1...Sxf7
- 2.Sxf7#
- 1...e4
- 2.Bf4#
- 2.Qf4#
- 2.Qg3#
- 1...Sxf5!
- threat
- 1.Rc4?
- 1...Bxe7
- 2.Qd2#
- 1...Sxf5
- 2.Sf7#
- 1...e4
- 2.Bf4#
- 1...Ra8
- 2.Rxd7#
- 1...Rb8
- 2.Rxd7#
- 1...Rc8
- 2.Rxd7#
- 1...Re8
- 2.Rxd7#
- 1...Sg4
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Sg8
- 2.Sf7#
- 1...dxe6!
- 1...Bxe7
- 1.Rc5?
- threat
- 2.Se4#
- 1...e4
- 2.Sxe4#
- 2.Bf4#
- 1...bxc5+!
- threat
- 1.Rxd8?
- threat
- 2.Rexd7#
- 2.Rdxd7#
- 1...Bxe7
- 2.Rxd7#
- 1...Sxf5
- 2.Rdxd7#
- 1...e4
- 2.Bf4#
- 1...Kc7!
- threat
- 1.Qh4?
- 1...Rxc8
- 2.Rxd7#
- 1...Sxf5
- 2.Sf7#
- 1...dxe6
- 2.Rxd8#
- 1...e4
- 2.Bf4#
- 1...Re8
- 2.Rxd7#
- 1...Sg4
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Sg8
- 2.Sf7#
- 1...Bxe7!
- 1...Rxc8
- 1.Kb3?
- Keys
- 1.exd7!
- 1...Rxd7
- 2.Re6#
- 1...Rxc8
- 2.dxc8S#
- 1...Bxe7
- 2.Qd2#
- 1...Sxf5
- 2.Sf7#
- 1...Re8
- 2.dxe8S#
- 1...Sg4
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Sg8
- 2.Sf7#
- 1...e4
- 2.Bf4#
- 1...Rxd7
- 1.exd7!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 1
- Sets
- R(h);N_GUARD,XR(J)::R1(I),XP(f)
- R(h);N_GUARD::R1(I),XP(f)
- B(i);SBLOCK,XR(I)::QAR(F)
- S(d);N_GUARD::S(K)
- S(d);N_GUARD,XP(E)::S(K)
- S(d);N_GUARD::S(K),XS(d)
- P(a);OGATEB::B(A)
- P(f);OGATEB,XP(G)::R(J),XR(h)
- Tries
- Try
- K(C);P-FLIGHT
- Threat
- B(A)
- Vars
- P(a);OGATEB::B(A)
- Refutation
- R(h);XR(J)
- Try
- K(C);P-FLIGHT
- Threat
- B(A)
- Vars
- P(a);OGATEB::B(A)
- Refutation
- R(h);XR(J)
- Try
- K(C);P-FLIGHT
- Threat
- DUALS(2)
- Vars
- P(a);OGATEB::B(A)
- Refutation
- R(h);CHECK,XR(J)
- Try
- B(A);
- Vars
- R(h);N_GUARD,XR(J)::R1(I),XP(f)
- B(i);SBLOCK,XR(I)::QAR(F)
- S(d);N_GUARD,XP(E)::S(K)
- P(f);OGATEB,XP(G)::R(J),XR(h)
- R(h);N_GUARD::R1(I),XP(f)
- S(d);N_GUARD::S(K)
- S(d);N_GUARD::S(K),XS(d)
- Refutation
- P(a);
- Try
- B(A);
- Vars
- R(h);N_GUARD,XR(J)::R1(I),XP(f)
- S(d);N_GUARD,XP(E)::S(K)
- P(f);OGATEB,XP(G)::R(J),XR(h)
- P(a);OGATEB::B(A)
- R(h);N_GUARD::R1(I),XP(f)
- S(d);N_GUARD::S(K)
- S(d);N_GUARD::S(K),XS(d)
- Refutation
- B(i);XR(I)
- Try
- B(A);
- Threat
- DUALS(3)
- Vars
- R(h);N_GUARD,XR(J)::R1(I),XP(f)
- Refutation
- P(a);
- Try
- B(A);
- Vars
- R(h);N_GUARD,XR(J)::R1(I),XP(f)
- S(d);N_GUARD,XP(E)::S(K)
- P(f);OGATEB,XP(G)::R(J),XR(h)
- P(a);OGATEB::B(A)
- R(h);N_GUARD::R1(I),XP(f)
- S(d);N_GUARD::S(K)
- S(d);N_GUARD::S(K),XS(d)
- Refutation
- B(i);XR(I)
- Try
- R(I);
- Threat
- QAR(F)
- Vars
- R(h);N_GUARD,XR(J)::R1(I),XP(f)
- S(d);XR(I)::S(K),XS(d)
- Refutation
- S(d);XP(E)
- Try
- R(J);
- Vars
- B(i);SBLOCK,XR(I)::QAR(F)
- S(d);N_GUARD,XP(E)::S(K)
- P(a);OGATEB::B(A)
- R(h);N_GUARD::R1(I),XP(f)
- S(d);N_GUARD::S(K)
- S(d);N_GUARD::S(K),XS(d)
- Refutation
- P(f);XP(G)
- Try
- R(J);
- Threat
- S(B)
- Refutation
- P(b);CHECK,XR(J)
- Try
- R(J);P_PINP(f),XR(h)
- Threat
- DUALS(2)
- Vars
- B(i);XR(I)::R1(J),XP(f)
- S(d);XP(E)::R1(J),XP(f)
- P(a);OGATEB::B(A)
- Refutation
- K(c);P_PINR(I),S_FLIGHT
- Try
- Q(F);
- Vars
- R(h);N_GUARD,XR(J)::R1(I),XP(f)
- S(d);N_GUARD,XP(E)::S(K)
- P(f);OGATEB,XP(G)::R(J),XR(h)
- P(a);OGATEB::B(A)
- R(h);N_GUARD::R1(I),XP(f)
- S(d);N_GUARD::S(K)
- S(d);N_GUARD::S(K),XS(d)
- Refutation
- B(i);XR(I)
- Try
- Actual
- P(G);XP(f)
- Vars
- R(h);SBLOCK,XP(G)::R1(I)
- R(h);OGATE,XR(J)::PXR(h)=S
- B(i);SBLOCK,XR(I)::QAR(F)
- S(d);N_GUARD,XP(E)::S(K)
- R(h);OGATE::PXR(h)=S
- S(d);N_GUARD::S(K)
- S(d);N_GUARD::S(K),XS(d)
- P(a);OGATEB::B(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).