MESON Chess Problem Database
Problem Display
PID: 85282 (8/7Q/NPppn3/3kr2p/3B3K/3Pp3/n3N3/8 w - - 0 1)
Ivunin, Alexey Vsevolodovich
Na Smenu!, 1968
#2
7 + 8
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Re4+
- 2.Qxe4#
- 1...Rf5
- 2.Qxf5#
- 1...Rg5
- 2.Qe4#
- 1...Sc1
- 2.Sb4#
- 1...Sc3
- 2.Sb4#
- 1...Sb4
- 2.Sxb4#
- 1...Sxd4
- 2.Sf4#
- 1...Sf4
- 2.Sc7#
- 1...Sc5
- 2.Sc7#
- 1...Sg5
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sc7#
- 1...Sd8
- 2.Sc7#
- 1...Sf8
- 2.Sc7#
- 1...c5
- 2.Qb7#
- 1...Re4+
- Tries
- 1.Bxe3?
- 1...Re4+
- 2.Qxe4#
- 1...Rf5
- 2.Qxf5#
- 1...Rg5
- 2.Qe4#
- 1...Sd4
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 2.Sc7#
- 1...Sc5
- 2.Sf4#
- 2.Sc7#
- 1...Sg5
- 2.Sf4#
- 2.Sc7#
- 1...Sc7
- 2.Sf4#
- 2.Sxc7#
- 1...Sg7
- 2.Sf4#
- 2.Sc7#
- 1...Sd8
- 2.Sf4#
- 2.Sc7#
- 1...Sf8
- 2.Sf4#
- 2.Sc7#
- 1...c5
- 2.Qb7#
- 1...Sc1
- 2.Sc3#
- 2.Sb4#
- 1...Sc3
- 2.Sxc3#
- 2.Sb4#
- 1...Sb4
- 2.Sc3#
- 2.Sxb4#
- 1...Rxe3!
- 1...Re4+
- 1.Qg6?
- 1...Re4+
- 2.Qxe4#
- 1...Sxd4
- 2.Sf4#
- 1...Sc1
- 2.Sb4#
- 1...Rf5
- 2.Qxf5#
- 1...Rg5
- 2.Qe4#
- 1...Sc3
- 2.Sb4#
- 1...Sb4
- 2.Sxb4#
- 1...Sf4
- 2.Sc7#
- 1...Sc5
- 2.Sc7#
- 1...Sg5
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sc7#
- 1...Sd8
- 2.Sc7#
- 1...Sf8
- 2.Sc7#
- 1...c5!
- 1...Re4+
- 1.Qg8?
- threat
- 2.Sc7#
- 1...c5
- 2.Qa8#
- 1...Re4+!
- threat
- 1.Qf7?
- threat
- 2.Sc7#
- 1...c5
- 2.Qb7#
- 1...Re4+!
- threat
- 1.b7?
- 1...Re4+
- 2.Qxe4#
- 1...Sxd4
- 2.Sf4#
- 1...Sf4
- 2.Sc7#
- 1...Sc5
- 2.Sc7#
- 1...Sg5
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sc7#
- 1...Sd8
- 2.Sc7#
- 1...Sf8
- 2.Sc7#
- 1...Rf5
- 2.Qxf5#
- 1...Rg5
- 2.Qe4#
- 1...Sc1
- 2.Sb4#
- 1...Sc3
- 2.Sb4#
- 1...Sb4
- 2.Sxb4#
- 1...c5!
- 1...Re4+
- 1.Bxe3?
- Keys
- 1.Bc5!
- 1...Re4+
- 2.Qxe4#
- 1...Sxc5
- 2.Sc7#
- 1...dxc5
- 2.Qd7#
- 1...Rf5
- 2.Qxf5#
- 1...Rg5
- 2.Qe4#
- 1...Sd4
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sg5
- 2.Sf4#
- 1...Sc7
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...Sd8
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...Sc1
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sb4
- 2.Sc3#
- 1...Re4+
- 1.Bc5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 9
- ADDED MATES = 1
- REMOVED MATES = 1
- Sets
- R(d);CHECK,N_GUARD::QAB1(G),XR(d)
- R(d);OGATEB::QAR2(G),XR(d)
- R(d);N_GUARD::QAB1(G)
- S(a);N_GUARD::S(E)
- S(a);N_GUARD::S(E),XS(a)
- S(h);N_GUARD,SBLOCK,XB(C)::S(A)
- S(h);N_GUARD::S(E)
- S(h);N_GUARD::S(E),XS(h)
- P(f);OGATEB::QAB(G)
- Tries
- Try
- B(C);XP(b)
- Vars
- R(d);CHECK,N_GUARD::QAB1(G),XR(d)
- R(d);OGATEB::QAR2(G),XR(d)
- R(d);N_GUARD::QAB1(G)
- S(h);N_GUARD::S(A)
- P(f);OGATEB::QAB(G)
- Refutation
- R(d);XB(C)
- Try
- Q(G);
- Vars
- R(d);CHECK,N_GUARD::QAB1(G),XR(d)
- S(h);N_GUARD,SBLOCK,XB(C)::S(A)
- S(a);N_GUARD::S(E)
- R(d);OGATEB::QAR2(G),XR(d)
- R(d);N_GUARD::QAB1(G)
- S(a);N_GUARD::S(E),XS(a)
- S(h);N_GUARD::S(E)
- S(h);N_GUARD::S(E),XS(h)
- Refutation
- P(f);
- Try
- Q(G);P_PINS(h)
- Threat
- S(E)
- Vars
- P(f);OGATEB::QAB(G)
- Refutation
- R(d);CHECK
- Try
- Q(G);P_PINS(h)
- Threat
- S(E)
- Vars
- P(f);OGATEB::QAB(G)
- Refutation
- R(d);CHECK
- Try
- P(F);
- Vars
- R(d);CHECK,N_GUARD::QAB1(G),XR(d)
- S(h);N_GUARD,SBLOCK,XB(C)::S(A)
- S(h);N_GUARD::S(E)
- S(h);N_GUARD::S(E),XS(h)
- R(d);OGATEB::QAR2(G),XR(d)
- R(d);N_GUARD::QAB1(G)
- S(a);N_GUARD::S(E)
- S(a);N_GUARD::S(E),XS(a)
- Refutation
- P(f);
- Try
- Actual
- B(C);
- Vars
- R(d);CHECK,N_GUARD::QAB1(G),XR(d)
- S(h);N_GUARD,SBLOCK,XB(C)::S(E)
- P(g);OGATEB,XB(C)::QAR2(G)
- R(d);OGATEB::QAR2(G),XR(d)
- R(d);N_GUARD::QAB1(G)
- S(h);N_GUARD::S(A)
- S(h);N_GUARD::S(A),XS(h)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),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).