MESON Chess Problem Database
Problem Display
PID: 238000 (5r2/1N2P2Q/1RBR1p2/2P2P2/2k3K1/b7/ppP1n3/qrnN4 w - - 0 1)
Bogdanov, Evgeny Mikhailovich
Revista Romana de Sah, 1971
#2
11 + 10
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Rf7
- 2.Qxf7#
- 1...Ra8
- 2.Qf7#
- 1...Rb8
- 2.Qf7#
- 1...Rc8
- 2.Qf7#
- 1...Rd8
- 2.Qf7#
- 1...Re8
- 2.Qf7#
- 1...Rg8+
- 2.Qxg8#
- 1...Rh8
- 2.Qf7#
- 1...Bb4
- 2.Bb5#
- 1...Bxc5
- 2.Sa5#
- 1...Sb3
- 2.cxb3#
- 1...Sd3
- 2.cxd3#
- 1...Sc3
- 2.Se3#
- 1...Sd4
- 2.Bd5#
- 1...Rf7
- Tries
- 1.Rb3?
- threat
- 2.Se3#
- 2.Bb5#
- 1...Rg8+
- 2.Qxg8#
- 1...Bxc5
- 2.Sa5#
- 2.Bb5#
- 1...Bb4
- 2.Se3#
- 1...Sc3
- 2.Se3#
- 1...Sd4
- 2.Se3#
- 2.Bd5#
- 1...Sxb3!
- threat
- 1.Rb5?
- threat
- 2.Sa5#
- 1...Rg8+
- 2.Qxg8#
- 1...Ra8
- 2.Qf7#
- 1...Sb3
- 2.cxb3#
- 1...Bb4!
- threat
- 1.Rd3?
- threat
- 2.Se3#
- 2.Bd5#
- 1...Rg8+
- 2.Qxg8#
- 1...Bxc5
- 2.Sa5#
- 2.Bd5#
- 1...Rd8
- 2.Se3#
- 1...Sc3
- 2.Se3#
- 1...Sd4
- 2.Se3#
- 2.Rc3#
- 1...Sf4
- 2.Se3#
- 1...Sxd3!
- threat
- 1.Rd5?
- threat
- 2.Sa5#
- 2.Sd6#
- 1...Bxc5
- 2.Sa5#
- 1...Ra8
- 2.Sd6#
- 1...Rd8
- 2.Sa5#
- 1...Bb4
- 2.Sd6#
- 1...Sb3
- 2.Sd6#
- 2.cxb3#
- 1...Rg8+!
- threat
- 1.Qg8+?
- 1...Rf7
- 2.Qxf7#
- 1...Rxg8+!
- 1...Rf7
- 1.Qh1?
- threat
- 2.Qd5#
- 1...Sc3
- 2.Se3#
- 1...Sf4
- 2.Qe4#
- 1...Rg8+!
- threat
- 1.exf8Q?
- threat
- 2.Qhg8#
- 2.Qhf7#
- 2.Qff7#
- 2.Qfg8#
- 1...Sc3
- 2.Se3#
- 1...Sd4
- 2.Bd5#
- 1...Sf4!
- threat
- 1.exf8S?
- threat
- 2.Qg8#
- 2.Qf7#
- 1...Sc3
- 2.Se3#
- 1...Sd4
- 2.Bd5#
- 1...Sf4!
- threat
- 1.exf8B?
- threat
- 2.Qg8#
- 2.Qf7#
- 1...Sc3
- 2.Se3#
- 1...Sd4
- 2.Bd5#
- 1...Sf4!
- threat
- 1.exf8R?
- threat
- 2.Qg8#
- 2.Qf7#
- 1...Sc3
- 2.Se3#
- 1...Sd4
- 2.Bd5#
- 1...Sf4!
- threat
- 1.e8Q?
- threat
- 2.Qe6#
- 1...Rg8+
- 2.Qhxg8#
- 2.Qexg8#
- 1...Sc3
- 2.Se3#
- 1...Sd4
- 2.Bd5#
- 1...Sf4
- 2.Qe4#
- 1...Rxe8!
- threat
- 1.Rb3?
- Keys
- 1.c3!
- 1...Rg8+
- 2.Qxg8#
- 1...Bxc5
- 2.Sa5#
- 1...Sxc3
- 2.Se3#
- 1...Bb4
- 2.Rxb4#
- 1...Sd4
- 2.Rxd4#
- 1...Sg1
- 2.Rd4#
- 1...Rf7
- 2.Qxf7#
- 1...Ra8
- 2.Qf7#
- 1...Rb8
- 2.Qf7#
- 1...Rc8
- 2.Qf7#
- 1...Rd8
- 2.Qf7#
- 1...Re8
- 2.Qf7#
- 1...Rh8
- 2.Qf7#
- 1...Sb3
- 2.Bb5#
- 1...Sd3
- 2.Bd5#
- 1...Sg3
- 2.Rd4#
- 1...Sf4
- 2.Rd4#
- 1...Rg8+
- 1.c3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 4
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- R(j);N_GUARD::QAB(K),XR(j)
- R(j);N_GUARD::QAB(K)
- R(j);CHECK,N_GUARD::QAB(K),XR(j)
- B(g);SBLOCK::B(G)
- B(g);SBLOCK,XP(D)::S(I)
- S(c);OGATE::P(B),XS(c)
- S(f);SBLOCK::S(A)
- S(f);SBLOCK::B(G)
- Tries
- Try
- R(F);
- Threat
- DUALS(2)
- Vars
- R(j);CHECK,N_GUARD::QAB(K),XR(j)
- B(g);::S(A)
- S(f);::S(A)
- Refutation
- S(c);XR(F)
- Try
- R(F);
- Threat
- S(I)
- Vars
- R(j);CHECK,N_GUARD::QAB(K),XR(j)
- R(j);N_GUARD::QAB(K)
- S(c);OGATE::P(B),XS(c)
- Refutation
- B(g);
- Try
- R(H);
- Threat
- DUALS(2)
- Vars
- R(j);CHECK,N_GUARD::QAB(K),XR(j)
- R(j);::S(A)
- S(f);::S(A)
- Refutation
- S(c);XR(H)
- Try
- R(H);
- Threat
- DUALS(2)
- Vars
- B(g);XP(D)::S(I)
- R(j);::S(I)
- B(g);::S(I)
- Refutation
- R(j);CHECK
- Try
- Q(K);CHECK
- Vars
- R(j);N_GUARD,P_SPINR(j)::QAB(K),XR(j)
- Refutation
- R(j);CHECK,XQ(K)
- Try
- Q(K);
- Threat
- QAB1(K)
- Vars
- S(f);SBLOCK::S(A)
- S(f);N_GUARD::QAR2(K)
- Refutation
- R(j);CHECK
- Try
- P(J);XR(j)
- Threat
- DUALS(4)
- Vars
- S(f);SBLOCK::S(A)
- S(f);SBLOCK::B(G)
- Refutation
- S(f);
- Try
- P(J);XR(j)
- Threat
- DUALS(2)
- Vars
- S(f);SBLOCK::S(A)
- S(f);SBLOCK::B(G)
- Refutation
- S(f);
- Try
- P(J);XR(j)
- Threat
- DUALS(2)
- Vars
- S(f);SBLOCK::S(A)
- S(f);SBLOCK::B(G)
- Refutation
- S(f);
- Try
- P(J);XR(j)
- Threat
- DUALS(2)
- Vars
- S(f);SBLOCK::S(A)
- S(f);SBLOCK::B(G)
- Refutation
- S(f);
- Try
- P(J);
- Threat
- QAB(J)
- Vars
- S(f);SBLOCK::S(A)
- S(f);SBLOCK::B(G)
- S(f);N_GUARD::QAR2(J)
- Refutation
- R(j);XQ(J)
- Try
- Actual
- P(B);
- Vars
- R(j);CHECK,N_GUARD::QAB(K),XR(j)
- B(g);SBLOCK,XP(D)::S(I)
- S(f);SBLOCK,XP(B)::S(A)
- B(g);N_GUARD::R1(F),XB(g)
- S(f);N_GUARD::R1(H),XS(f)
- S(f);N_GUARD::R1(H)
- R(j);N_GUARD::QAB(K),XR(j)
- R(j);N_GUARD::QAB(K)
- S(c);SBLOCK::B(G)
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).