MESON Chess Problem Database
Problem Display
PID: 93300 (8/8/1n3p1N/b1B1pPp1/1p2k1p1/1Q1N2R1/2p2Pn1/2K5 w - - 0 1)
Koetsheid, Petrus Albertus
1/2 Comm., Arbejder-Skak, 1955
#2
8 + 10
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Se1
- 2.Re3#
- 1...Se3
- 2.Rxe3#
- 1...Sf4
- 2.Re3#
- 1...Sh4
- 2.Re3#
- 1...Sa4
- 2.Qc4#
- 1...Sc4
- 2.Qxc4#
- 1...Sd5
- 2.Qc4#
- 1...Sd7
- 2.Qc4#
- 1...Sa8
- 2.Qc4#
- 1...Sc8
- 2.Qc4#
- 1...Se1
- Tries
- 1.Kxc2?
- 1...Se3+
- 2.Rxe3#
- 1...Sc4
- 2.Qxc4#
- 1...Sf4
- 2.Re3#
- 1...Sh4
- 2.Re3#
- 1...Sa4
- 2.Qc4#
- 1...Sd5
- 2.Qc4#
- 1...Sd7
- 2.Qc4#
- 1...Sa8
- 2.Qc4#
- 1...Sc8
- 2.Qc4#
- 1...Se1+!
- 1...Se3+
- 1.Se1?
- 1...Kf4
- 2.Rxg4#
- 1...Sxe1
- 2.Rxg4#
- 1...Sc4
- 2.Qxc4#
- 1...Sf4
- 2.Re3#
- 1...Sh4
- 2.Rxg4#
- 1...Sa4
- 2.Qc4#
- 1...Sd5
- 2.Qc4#
- 1...Sd7
- 2.Qc4#
- 1...Sa8
- 2.Qc4#
- 1...Sc8
- 2.Qc4#
- 1...Se3!
- 1...Kf4
- 1.Sb2?
- 1...Kf4
- 2.Rxg4#
- 1...Sc4
- 2.Qxc4#
- 1...Se1
- 2.Rxg4#
- 1...Sf4
- 2.Re3#
- 1...Sh4
- 2.Rxg4#
- 1...Sa4
- 2.Qc4#
- 1...Sd5
- 2.Qc4#
- 1...Sd7
- 2.Qc4#
- 1...Sa8
- 2.Qc4#
- 1...Sc8
- 2.Qc4#
- 1...Se3!
- 1...Kf4
- 1.Sxb4?
- 1...Kf4
- 2.Rxg4#
- 1...Se3
- 2.Qxe3#
- 1...Se1
- 2.Rxg4#
- 2.Qe3#
- 1...Sf4
- 2.Re3#
- 2.Qe3#
- 1...Sh4
- 2.Rxg4#
- 2.Qe3#
- 1...Sa4
- 2.Qc4#
- 1...Sc4
- 2.Qxc4#
- 1...Sd5
- 2.Qc4#
- 1...Sd7
- 2.Qc4#
- 1...Sa8
- 2.Qc4#
- 1...Sc8
- 2.Qc4#
- 1...Bxb4!
- 1...Kf4
- 1.Be3?
- threat
- 2.Sc5#
- 1...Sc4
- 2.Qxc4#
- 1...Sa4
- 2.Qc4#
- 1...Sd7
- 2.Qc4#
- 1...Sxe3!
- threat
- 1.Bxb6?
- threat
- 2.Qc4#
- 1...Se3
- 2.Rxe3#
- 1...Bxb6!
- threat
- 1.Qa2?
- 1...Se3
- 2.Rxe3#
- 1...Sc4
- 2.Qxc4#
- 1...Se1
- 2.Re3#
- 1...Sf4
- 2.Re3#
- 1...Sh4
- 2.Re3#
- 1...Sa4
- 2.Qc4#
- 1...Sd5
- 2.Qc4#
- 1...Sd7
- 2.Qc4#
- 1...Sa8
- 2.Qc4#
- 1...Sc8
- 2.Qc4#
- 1...b3!
- 1...Se3
- 1.f4?
- 1...Sxf4
- 2.Sf2#
- 2.Re3#
- 1...exf4
- 2.Qe6#
- 1...gxf4
- 2.Sf2#
- 1...Sc4
- 2.Qxc4#
- 1...Se3
- 2.Rxe3#
- 1...Se1
- 2.Re3#
- 1...Sh4
- 2.Re3#
- 1...Sa4
- 2.Qc4#
- 1...Sd5
- 2.Qc4#
- 1...Sd7
- 2.Qc4#
- 1...Sa8
- 2.Qc4#
- 1...Sc8
- 2.Qc4#
- 1...gxf4 ep!
- 1...Sxf4
- 1.Kxc2?
- Keys
- 1.Sf4!
- 1...Kxf4
- 2.Rxg4#
- 1...Sxf4
- 2.Re3#
- 1...exf4
- 2.Qe6#
- 1...gxf4
- 2.Qd3#
- 1...Se3
- 2.Qxe3#
- 1...Se1
- 2.Qe3#
- 1...Sh4
- 2.Qe3#
- 1...Sa4
- 2.Qc4#
- 1...Sc4
- 2.Qxc4#
- 1...Sd5
- 2.Qc4#
- 1...Sd7
- 2.Qc4#
- 1...Sa8
- 2.Qc4#
- 1...Sc8
- 2.Qc4#
- 1...Kxf4
- 1.Sf4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 3
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- S(b);N_GUARD::R1(E)
- S(b);N_GUARD::R1(E),XS(b)
- S(i);N_GUARD::QAR2(C)
- S(i);N_GUARD::QAR2(C),XS(i)
- Tries
- Try
- K(A);P-FLIGHT,XP(a)
- Vars
- S(b);CHECK,N_GUARD::R1(E),XS(b)
- S(i);N_GUARD::QAR2(C),XS(i)
- S(b);N_GUARD::R1(E)
- S(i);N_GUARD::QAR2(C)
- Refutation
- S(b);CHECK
- Try
- S(D);
- Vars
- K(d);P-FLIGHT::R1(E),XP(e)
- S(b);N_GUARD,XS(D)::R(E),XP(e)
- S(i);N_GUARD::QAR2(C),XS(i)
- S(b);N_GUARD,SBLOCK::R1(E)
- S(b);N_GUARD::R(E),XP(e)
- S(i);N_GUARD::QAR2(C)
- Refutation
- S(b);
- Try
- S(D);
- Vars
- K(d);P-FLIGHT::R1(E),XP(e)
- S(i);N_GUARD::QAR2(C),XS(i)
- S(b);N_GUARD::R(E),XP(e)
- S(b);N_GUARD,SBLOCK::R1(E)
- S(i);N_GUARD::QAR2(C)
- Refutation
- S(b);
- Try
- S(D);XP(c)
- Vars
- K(d);P-FLIGHT::R1(E),XP(e)
- S(b);N_GUARD::QAR1(C),XS(b)
- S(i);N_GUARD::QAR2(C)
- S(i);N_GUARD::QAR2(C),XS(i)
- Refutation
- B(f);XS(D)
- Try
- B(F);
- Threat
- S(D)
- Vars
- S(i);N_GUARD::QAR2(C),XS(i)
- S(i);N_GUARD::QAR2(C)
- Refutation
- S(b);XB(F)
- Try
- B(F);XS(i)
- Threat
- QAR2(C)
- Vars
- S(b);N_GUARD::R1(E),XS(b)
- Refutation
- B(f);XB(F)
- Try
- Q(C);
- Vars
- S(b);N_GUARD::R1(E),XS(b)
- S(i);N_GUARD::QAR2(C),XS(i)
- S(b);N_GUARD::R1(E)
- S(i);N_GUARD::QAR2(C)
- Refutation
- P(c);
- Try
- P(B);
- Vars
- P(g);OGATEB,XP(B)::QAR2(C)
- P(h);SBLOCK,XP(B)::S(D)
- S(i);N_GUARD::QAR2(C),XS(i)
- S(b);N_GUARD::R1(E),XS(b)
- S(b);N_GUARD::R1(E)
- S(i);N_GUARD::QAR2(C)
- Refutation
- P(e);EP,XP(B)
- Try
- Actual
- S(D);
- Vars
- K(d);OGATEB,P-FLIGHT,XS(D)::R1(E),XP(e)
- S(b);N_GUARD,SBLOCK,XS(D)::R1(E)
- P(g);OGATEB,SBLOCK,XS(D)::QAR2(C)
- P(h);SBLOCK,XS(D)::QAB1(C)
- S(b);N_GUARD::QAR1(C),XS(b)
- S(b);N_GUARD::QAR1(C)
- S(i);N_GUARD::QAR2(C)
- S(i);N_GUARD::QAR2(C),XS(i)
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).