MESON Chess Problem Database
Problem Display
PID: 115727 (2r5/8/2ppN2p/2pkPB1P/n3RpP1/4pQ2/4KPn1/3N4 w - - 0 1)
Eriksson, Finn Olof
Dala-Demokraten, 1936
#2
10 + 10
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rc7
- 2.Sxc7#
- 1...Ra8
- 2.Sc7#
- 1...Rb8
- 2.Sc7#
- 1...Rd8
- 2.Sc7#
- 1...Re8
- 2.Sc7#
- 1...Rf8
- 2.Sc7#
- 1...Rg8
- 2.Sc7#
- 1...Rh8
- 2.Sc7#
- 1...Se1
- 2.Sxf4#
- 1...Sh4
- 2.Sxf4#
- 1...Sb2
- 2.Sc3#
- 1...Sc3+
- 2.Sxc3#
- 1...Sb6
- 2.Sc3#
- 1...exf2
- 2.Qd3#
- 1...c4
- 2.Rxe3#
- 1...dxe5
- 2.Rd4#
- 1...Rc7
- Tries
- 1.Kf1?
- 1...exf2
- 2.Qd3#
- 1...dxe5
- 2.Rd4#
- 1...Rc7
- 2.Sxc7#
- 1...Ra8
- 2.Sc7#
- 1...Rb8
- 2.Sc7#
- 1...Rd8
- 2.Sc7#
- 1...Re8
- 2.Sc7#
- 1...Rf8
- 2.Sc7#
- 1...Rg8
- 2.Sc7#
- 1...Rh8
- 2.Sc7#
- 1...Se1
- 2.Sxf4#
- 1...Sh4
- 2.Sxf4#
- 1...Sb2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sb6
- 2.Sc3#
- 1...c4
- 2.Rxe3#
- 1...e2+!
- 1...exf2
- 1.Sxe3+?
- 1...Sxe3
- 2.Sxf4#
- 1...fxe3!
- 1...Sxe3
- 1.g5?
- 1...Sc3+
- 2.Sxc3#
- 1...exf2
- 2.Qd3#
- 1...dxe5
- 2.Rd4#
- 1...c4
- 2.Rxe3#
- 1...Rc7
- 2.Sxc7#
- 1...Ra8
- 2.Sc7#
- 1...Rb8
- 2.Sc7#
- 1...Rd8
- 2.Sc7#
- 1...Re8
- 2.Sc7#
- 1...Rf8
- 2.Sc7#
- 1...Rg8
- 2.Sc7#
- 1...Rh8
- 2.Sc7#
- 1...Se1
- 2.Sxf4#
- 1...Sh4
- 2.Sxf4#
- 1...Sb2
- 2.Sc3#
- 1...Sb6
- 2.Sc3#
- 1...hxg5!
- 1...Sc3+
- 1.Kf1?
- Keys
- 1.Qxf4!
- 1...Sxf4+
- 2.Sxf4#
- 1...Sc3+
- 2.Sxc3#
- 1...exf2
- 2.Qd2#
- 1...dxe5
- 2.Qxe5#
- 1...Rc7
- 2.Sxc7#
- 1...Ra8
- 2.Sc7#
- 1...Rb8
- 2.Sc7#
- 1...Rd8
- 2.Sc7#
- 1...Re8
- 2.Sc7#
- 1...Rf8
- 2.Sc7#
- 1...Rg8
- 2.Sc7#
- 1...Rh8
- 2.Sc7#
- 1...Se1
- 2.Sxe3#
- 1...Sh4
- 2.Sxe3#
- 1...Sb2
- 2.Sc3#
- 1...Sb6
- 2.Sc3#
- 1...c4
- 2.Rd4#
- 1...Sxf4+
- 1.Qxf4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 5
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(j);N_GUARD::S(J),XR(j)
- R(j);N_GUARD::S(J)
- S(a);N_GUARD::S(J),XP(d)
- S(c);N_GUARD::S(A)
- S(c);CHECK,N_GUARD::S(A),XS(c)
- P(b);OGATE,XP(C)::QAR2(D)
- P(e);SBLOCK::QAB(D)+R(E),XP(b)
- P(h);SBLOCK,XP(G)::QAB(D)+R(E),DCHECK
- Tries
- Try
- K(B);S_FLIGHT
- Vars
- P(b);OGATE,XP(C)::QAR2(D)
- P(h);SBLOCK,XP(G)::QAB(D)+R(E),DCHECK
- R(j);N_GUARD::S(J),XR(j)
- R(j);N_GUARD::S(J)
- S(a);N_GUARD::S(J),XP(d)
- S(c);N_GUARD::S(A)
- S(c);N_GUARD::S(A),XS(c)
- P(e);SBLOCK::QAB(D)+R(E),XP(b)
- Refutation
- P(b);CHECK
- Try
- S(A);CHECK,XP(b)
- Vars
- S(a);XS(A)::S(J),XP(d)
- Refutation
- P(d);XS(A)
- Try
- P(F);
- Vars
- S(c);CHECK,N_GUARD::S(A),XS(c)
- P(b);OGATE,XP(C)::QAR2(D)
- P(h);SBLOCK,XP(G)::QAB(D)+R(E),DCHECK
- P(e);SBLOCK::QAB(D)+R(E),XP(b)
- R(j);N_GUARD::S(J),XR(j)
- R(j);N_GUARD::S(J)
- S(a);N_GUARD::S(J),XP(d)
- S(c);N_GUARD::S(A)
- Refutation
- P(i);XP(F)
- Try
- Actual
- Q(D);XP(d)
- Vars
- S(a);CHECK,XQ(D)::S(J),XS(a)
- S(c);CHECK,N_GUARD::S(A),XS(c)
- P(b);OGATE,XP(C)::QAR(D)
- P(h);OGATE,XP(G)::QAR1(D),XP(h)
- R(j);N_GUARD::S(J),XR(j)
- R(j);N_GUARD::S(J)
- S(a);N_GUARD::S(A),XP(b)
- S(c);N_GUARD::S(A)
- P(e);N_GUARD::R1(E)
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).