MESON Chess Problem Database

Problem Display
PID: 44067 (1B4b1/b1NBK3/1P4Pp/Rnr1k2r/3p1NR1/p1pP1p2/5p2/2Q5 w - - 0 1)

Wrobel, Marian

Het Schaakleven, 1931

1B4b1/b1NBK3/1P4Pp/Rnr1k2r/3p1NR1/p1pP1p2/5p2/2Q5

#2

11 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc7
      • 2.Bxc7#
    • 1...Sxc7
      • 2.Bxc7#
  • Tries
    • 1.Sxb5+?
      • 1...Rc7
        • 2.Bxc7#
      • 1...Bxb8!
    • 1.Sa6+?
      • 1...Rc7
        • 2.Bxc7#
      • 1...Sd6
        • 2.Bxd6#
      • 1...Sc7
        • 2.Bxc7#
      • 1...Bxb8!
    • 1.Sce6+?
      • 1...Kf5
        • 2.Sxd4#
        • 2.Sg7#
      • 1...Rc7
        • 2.Rxb5#
      • 1...Sd6
        • 2.Rxc5#
      • 1...Sc7
        • 2.Rxc5#
      • 1...Bxb8!
    • 1.Sa8+?
      • 1...Rc7
        • 2.Bxc7#
      • 1...Sd6
        • 2.Bxd6#
      • 1...Sc7
        • 2.Bxc7#
      • 1...Bxb8!
    • 1.Se8+?
      • 1...Rc7
        • 2.Bxc7#
      • 1...Sd6
        • 2.Bxd6#
      • 1...Sc7
        • 2.Bxc7#
      • 1...Bxb8!
  • Keys
    • 1.Sfe6!
      • threat
        • 2.Qf4#
      • 1...Kf5
        • 2.Qf4#
      • 1...Rxc7
        • 2.Rxb5#
      • 1...Sxc7
        • 2.Rxc5#
      • 1...Rf5
        • 2.Re4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(g);OGATE,P_PINB(I),P_SPINR(g),P_SPINS(f),XS(H)::B(K),XR(g)
    • S(f);OGATE,P_SPINR(g),P_SPINS(f),XS(H)::B(K),XS(f)
  • Tries
    • Try
      • S(H);CHECK,XS(f)
      • Vars
        • R(g);N_GUARD,P_PINB(I),P_SPINR(g)::B(K),XR(g)
      • Refutation
        • B(k);XB(K)
    • Try
      • S(H);CHECK
      • Vars
        • R(g);N_GUARD,P_PINB(I),P_SPINR(g),P_SPINS(f)::B(K),XR(g)
        • S(f);N_GUARD,P_SPINR(g),P_SPINS(f)::B(K),XS(f)
      • Refutation
        • B(k);XB(K)
    • Try
      • S(H);CHECK
      • Vars
        • R(g);P_PINB(I),P_SPINR(g),P_SPINS(f),S_CUTB(k)::R(E),XS(f)
        • S(f);OGATE,P_SPINR(g),P_SPINS(f)::R(E),XR(g)
      • Refutation
        • B(k);XB(K)
    • Try
      • S(H);CHECK
      • Vars
        • R(g);N_GUARD,P_PINB(I),P_SPINR(g),P_SPINS(f)::B(K),XR(g)
        • S(f);N_GUARD,P_SPINR(g),P_SPINS(f)::B(K),XS(f)
      • Refutation
        • B(k);XB(K)
    • Try
      • S(H);CHECK
      • Vars
        • R(g);N_GUARD,P_PINB(I),P_SPINR(g),P_SPINS(f)::B(K),XR(g)
        • S(f);N_GUARD,P_SPINR(g),P_SPINS(f)::B(K),XS(f)
      • Refutation
        • B(k);XB(K)
  • Actual
    • S(C);
    • Threat
      • QAB1(A)
    • Vars
      • K(h);P-FLIGHT::QAR1(A)
      • R(g);OGATEB,P_PINB(I),P_SPINR(g),P_SPINS(f),XS(H)::R(E),XS(f)
      • S(f);OGATE,P_SPINR(g),P_SPINS(f),XS(H)::R(E),XR(g)
      • R(i);SBLOCK::R1(D)
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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).