MESON Chess Problem Database

Problem Display
PID: 2874 (8/p7/Rn2PNNB/1p1p1kP1/bK3P2/1p2p3/1P2P2p/5R1Q w - - 0 1)

Juchli, Josef

Basel Solving Ty., 1898

8/p7/Rn2PNNB/1p1p1kP1/bK3P2/1p2p3/1P2P2p/5R1Q

#2

12 + 9

2638 White to Play 1913
2681 All Change Here! 1919

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe6
      • 2.Qxd5#
    • 1...Kxg6
      • 2.f5#
    • 1...Sc4
      • 2.Sh4#
      • 2.Se7#
    • 1...Sd7
      • 2.Sh4#
      • 2.Se7#
    • 1...Sa8
      • 2.Sh4#
      • 2.Se7#
    • 1...Sc8
      • 2.Sh4#
    • 1...d4
      • 2.Qe4#
  • Tries
    • 1.Bg7?
      • 1...Kxe6
        • 2.Qxd5#
      • 1...Sc4
        • 2.Sh4#
        • 2.Se7#
      • 1...Sd7
        • 2.Sh4#
        • 2.Se7#
      • 1...Sa8
        • 2.Sh4#
        • 2.Se7#
      • 1...Sc8
        • 2.Sh4#
      • 1...d4
        • 2.Qe4#
      • 1...Kxg6!
    • 1.Bf8?
      • 1...Kxe6
        • 2.Qxd5#
      • 1...Sc4
        • 2.Sh4#
        • 2.Se7#
      • 1...Sd7
        • 2.Sh4#
        • 2.Se7#
      • 1...Sa8
        • 2.Sh4#
        • 2.Se7#
      • 1...Sc8
        • 2.Sh4#
      • 1...d4
        • 2.Qe4#
      • 1...Kxg6!
    • 1.Rf2?
      • 1...Kxe6
        • 2.Qxd5#
      • 1...Kxg6
        • 2.Qb1#
        • 2.f5#
      • 1...Sc4
        • 2.Sh4#
        • 2.Se7#
        • 2.Qb1#
      • 1...Sd7
        • 2.Sh4#
        • 2.Se7#
        • 2.Qb1#
      • 1...Sa8
        • 2.Sh4#
        • 2.Se7#
        • 2.Qb1#
      • 1...Sc8
        • 2.Sh4#
        • 2.Qb1#
      • 1...d4
        • 2.Qe4#
      • 1...exf2!
    • 1.Qxd5+?
      • 1...Kxg6
        • 2.Qe4#
        • 2.Qd3#
        • 2.f5#
      • 1...Sxd5+!
    • 1.e7?
      • 1...Ke6
        • 2.Qxd5#
      • 1...Sc4
        • 2.Sh4#
      • 1...Sd7
        • 2.Sh4#
      • 1...Sa8
        • 2.Sh4#
      • 1...Sc8
        • 2.Sh4#
      • 1...d4
        • 2.Qe4#
      • 1...Kxg6!
  • Keys
    • 1.Ra1!
      • 1...Kxe6
        • 2.Qxd5#
      • 1...Kxg6
        • 2.Qb1#
      • 1...Sc4
        • 2.Qb1#
      • 1...Sd7
        • 2.Qb1#
      • 1...Sa8
        • 2.Qb1#
      • 1...Sc8
        • 2.Qb1#
      • 1...d4
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(g);P_SPINS(h),S_FLIGHT,XP(I)::QAB1(B),XP(f)
    • K(g);OGATE,S_FLIGHT,XS(K)::P(F)
    • S(h);::S(K)
    • P(f);N_GUARD::QAB1(B)
  • Tries
    • Try
      • B(L);
      • Vars
        • K(g);P_SPINS(h),S_FLIGHT,XP(I)::QAB1(B),XP(f)
        • S(h);::S(K)
        • P(f);N_GUARD::QAB1(B)
      • Refutation
        • K(g);S_FLIGHT,XS(K)
    • Try
      • B(L);
      • Vars
        • K(g);P_SPINS(h),S_FLIGHT,XP(I)::QAB1(B),XP(f)
        • S(h);::S(K)
        • P(f);N_GUARD::QAB1(B)
      • Refutation
        • K(g);S_FLIGHT,XS(K)
    • Try
      • R(A);
      • Vars
        • K(g);P_SPINS(h),S_FLIGHT,XP(I)::QAB1(B),XP(f)
        • P(f);N_GUARD::QAB1(B)
      • Refutation
        • P(c);XR(A)
    • Try
      • Q(B);CHECK,XP(f)
      • Refutation
        • S(h);CHECK,XQ(B)
    • Try
      • P(I);
      • Vars
        • K(g);P_SPINS(h),S_FLIGHT::QAB1(B),XP(f)
        • S(h);::S(K)
        • P(f);N_GUARD::QAB1(B)
      • Refutation
        • K(g);S_FLIGHT,XS(K)
  • Actual
    • R(A);
    • Vars
      • K(g);P_SPINS(h),S_FLIGHT,XP(I)::QAB1(B),XP(f)
      • K(g);S_FLIGHT,XS(K)::QAB(B)
      • S(h);::QAB(B)
      • P(f);N_GUARD::QAB1(B)
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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).