MESON Chess Problem Database
Problem Display
PID: 110787 (8/2N5/2N3p1/1p4P1/1Pp1k1pK/1PQ2RPn/2nP4/8 w - - 0 1)
Petkov, Petko Andonov
Szachy, 1958
#2
10 + 7
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Sa1
- 2.Qe3#
- 1...Se1
- 2.Qe3#
- 1...Sa3
- 2.Qe3#
- 1...Se3
- 2.Qxe3#
- 1...Sxb4
- 2.Qe3#
- 1...Sd4
- 2.Qe3#
- 1...Sg1
- 2.Rf4#
- 1...Sf2
- 2.Rf4#
- 1...Sf4
- 2.Rxf4#
- 1...Sxg5
- 2.Rf4#
- 1...cxb3
- 2.Qd3#
- 1...gxf3
- 2.Qxc2#
- 1...Sa1
- Tries
- 1.Kxg4?
- threat
- 2.Qe5#
- 2.Qxc2#
- 1...Se3+
- 2.Rxe3#
- 2.Qxe3#
- 1...Sxb4
- 2.Re3#
- 2.Qd4#
- 2.Qe5#
- 2.Qe3#
- 1...cxb3
- 2.Qe5#
- 2.Qd3#
- 2.d3#
- 1...Sa1
- 2.Re3#
- 2.Qd4#
- 2.Qe5#
- 2.Qe3#
- 1...Se1
- 2.Re3#
- 2.Qd4#
- 2.Qe5#
- 2.Qe3#
- 1...Sa3
- 2.Re3#
- 2.Qd4#
- 2.Qe5#
- 2.Qe3#
- 1...Sd4
- 2.Re3#
- 2.Qxd4#
- 2.Qe3#
- 1...Sf4
- 2.Rxf4#
- 2.Qe5#
- 1...Sf2+!
- threat
- 1.Se5?
- 1...Sxb4
- 2.Qe3#
- 1...Sxg5
- 2.Rf4#
- 1...cxb3
- 2.d3#
- 1...Sd4
- 2.Qe3#
- 1...Sf4
- 2.Rxf4#
- 1...Sa1
- 2.Qe3#
- 1...Se1
- 2.Qe3#
- 1...Sa3
- 2.Qe3#
- 1...Se3
- 2.Qxe3#
- 1...Sg1
- 2.Rf4#
- 1...Sf2
- 2.Rf4#
- 1...gxf3!
- 1...Sxb4
- 1.Re3+?
- 1...Kf5
- 2.Se7#
- 2.Re5#
- 2.Qe5#
- 2.Qf6#
- 2.Qxc2#
- 1...Sxe3!
- 1...Kf5
- 1.Rf6?
- threat
- 2.Qxc2#
- 1...Sxb4
- 2.Qd4#
- 2.Qe3#
- 1...Sa1
- 2.Qd4#
- 2.Qe3#
- 1...Se1
- 2.Qd4#
- 2.Qe3#
- 1...Sa3
- 2.Qd4#
- 2.Qe3#
- 1...Se3
- 2.Qd4#
- 2.Qxe3#
- 1...Sd4
- 2.Qxd4#
- 2.Qe3#
- 1...Sf2
- 2.Rf4#
- 1...Sf4
- 2.Rxf4#
- 1...cxb3!
- threat
- 1.Rf7?
- threat
- 2.Qxc2#
- 1...Sxb4
- 2.Qd4#
- 2.Qe3#
- 1...Sa1
- 2.Qd4#
- 2.Qe3#
- 1...Se1
- 2.Qd4#
- 2.Qe3#
- 1...Sa3
- 2.Qd4#
- 2.Qe3#
- 1...Se3
- 2.Qd4#
- 2.Qxe3#
- 1...Sd4
- 2.Qxd4#
- 2.Qe3#
- 1...Sf2
- 2.Rf4#
- 1...Sf4
- 2.Rxf4#
- 1...cxb3!
- threat
- 1.Rf8?
- threat
- 2.Qxc2#
- 1...Sxb4
- 2.Qd4#
- 2.Qe3#
- 1...Sa1
- 2.Qd4#
- 2.Qe3#
- 1...Se1
- 2.Qd4#
- 2.Qe3#
- 1...Sa3
- 2.Qd4#
- 2.Qe3#
- 1...Se3
- 2.Qd4#
- 2.Qxe3#
- 1...Sd4
- 2.Qxd4#
- 2.Qe3#
- 1...Sf2
- 2.Rf4#
- 1...Sf4
- 2.Rxf4#
- 1...cxb3!
- threat
- 1.d3+?
- 1...cxd3
- 2.Qxd3#
- 1...Kxf3!
- 1...cxd3
- 1.d4?
- 1...Sxb4
- 2.Qe3#
- 1...Sxd4
- 2.Qe3#
- 1...Sxg5
- 2.Rf4#
- 1...cxb3
- 2.Qd3#
- 1...cxd4 ep
- 2.Qxd3#
- 1...Se3
- 2.Qxe3#
- 1...Sf4
- 2.Rxf4#
- 1...Sa1
- 2.Qe3#
- 1...Se1
- 2.Qe3#
- 1...Sa3
- 2.Qe3#
- 1...Sg1
- 2.Rf4#
- 1...Sf2
- 2.Rf4#
- 1...gxf3!
- 1...Sxb4
- 1.bxc4?
- threat
- 2.Qd3#
- 1...Sxb4
- 2.Qe3#
- 1...gxf3
- 2.Qxc2#
- 1...Se3
- 2.Qxe3#
- 1...Sf4
- 2.Rxf4#
- 1...Se1
- 2.Qe3#
- 1...Sf2
- 2.Rf4#
- 1...bxc4!
- threat
- 1.Kxg4?
- Keys
- 1.Qf6!
- 1...Sxb4
- 2.Re3#
- 1...Sxg5
- 2.Qf4#
- 1...cxb3
- 2.d3#
- 1...gxf3
- 2.Qxg6#
- 1...Se3
- 2.Rxe3#
- 1...Sf4
- 2.Qxf4#
- 1...Sa1
- 2.Re3#
- 1...Se1
- 2.Re3#
- 1...Sa3
- 2.Re3#
- 1...Sd4
- 2.Re3#
- 1...Sg1
- 2.Qf4#
- 1...Sf2
- 2.Qf4#
- 1...c3
- 2.d3#
- 1...Sxb4
- 1.Qf6!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 12
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- S(a);N_GUARD::QAR1(C)
- S(a);N_GUARD::QAR1(C),XS(a)
- S(a);N_GUARD,XP(F)::QAR1(C)
- S(b);N_GUARD::R1(D)
- S(b);N_GUARD::R1(D),XS(b)
- S(b);N_GUARD,XP(H)::R1(D)
- P(c);N_GUARD,XP(B)::QAB1(C)
- P(e);SBLOCK,XR(D)::QAB(C),XS(a)
- Tries
- Try
- K(G);P-FLIGHT,XP(e)
- Threat
- DUALS(2)
- Refutation
- S(b);CHECK
- Try
- S(I);
- Vars
- S(a);N_GUARD,XP(F)::QAR1(C)
- S(b);N_GUARD,XP(H)::R1(D)
- P(c);N_GUARD,XP(B)::P(A)
- S(a);N_GUARD::QAR1(C)
- S(b);N_GUARD::R1(D),XS(b)
- S(a);N_GUARD::QAR1(C),XS(a)
- S(b);N_GUARD::R1(D)
- Refutation
- P(e);XR(D)
- Try
- R(D);CHECK
- Refutation
- S(a);XR(D)
- Try
- R(D);
- Threat
- QAB(C),XS(a)
- Vars
- S(b);N_GUARD::R1(D)
- S(b);N_GUARD::R1(D),XS(b)
- Refutation
- P(c);XP(B)
- Try
- R(D);
- Threat
- QAB(C),XS(a)
- Vars
- S(b);N_GUARD::R1(D)
- S(b);N_GUARD::R1(D),XS(b)
- Refutation
- P(c);XP(B)
- Try
- R(D);
- Threat
- QAB(C),XS(a)
- Vars
- S(b);N_GUARD::R1(D)
- S(b);N_GUARD::R1(D),XS(b)
- Refutation
- P(c);XP(B)
- Try
- P(A);CHECK
- Vars
- P(c);OGATE,XP(A)::QAB1(C),XP(c)
- Refutation
- K(d);S_FLIGHT,XR(D)
- Try
- P(A);
- Vars
- S(a);N_GUARD,XP(F)::QAR1(C)
- S(a);N_GUARD,XP(A)::QAR1(C)
- S(b);N_GUARD,XP(H)::R1(D)
- P(c);N_GUARD,XP(B)::QAB1(C)
- P(c);EP,N_GUARD,XP(A)::QAB1(C),XP(c)
- S(a);N_GUARD::QAR1(C),XS(a)
- S(b);N_GUARD::R1(D),XS(b)
- S(a);N_GUARD::QAR1(C)
- S(b);N_GUARD::R1(D)
- Refutation
- P(e);XR(D)
- Try
- P(B);XP(c)
- Threat
- QAB1(C)
- Vars
- S(a);N_GUARD,XP(F)::QAR1(C)
- P(e);SBLOCK,XR(D)::QAB(C),XS(a)
- S(a);N_GUARD::QAR1(C),XS(a)
- S(b);N_GUARD::R1(D),XS(b)
- S(a);N_GUARD::QAR1(C)
- S(b);N_GUARD::R1(D)
- Refutation
- P(f);XP(B)
- Try
- Actual
- Q(C);
- Vars
- S(a);N_GUARD,XP(F)::R1(D)
- S(b);N_GUARD,XP(H)::QAR1(C)
- P(c);N_GUARD,XP(B)::P(A)
- P(e);SBLOCK,XR(D)::QAB(C),XP(g)
- S(a);N_GUARD::R1(D),XS(a)
- S(b);N_GUARD::QAR1(C),XS(b)
- S(a);N_GUARD::R1(D)
- S(b);N_GUARD::QAR1(C)
- P(c);N_GUARD::P(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).