MESON Chess Problem Database

Problem Display
PID: 263023 (R5K1/R2pk1p1/2p1P3/2prbP2/4P3/6Q1/7B/8 w - - 0 1)

Lipton, Michael

1st Prize, BCPS Weekend TT, 2018

R5K1/R2pk1p1/2p1P3/2prbP2/4P3/6Q1/7B/8

#2

8 + 7

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Rxd7#
    • 1...Kf6
      • 2.Qxg7#
    • 1...Bd6
      • 2.Qg5#
      • 2.Qxg7#
    • 1...Bc7
      • 2.Qg5#
      • 2.Qxg7#
  • Tries
    • 1.Rxd7+?
      • 1...Kf6
        • 2.Rf7#
        • 2.Rf8#
        • 2.Qg6#
        • 2.Qxg7#
      • 1...Rxd7!
    • 1.Re8+?
      • 1...Kd6
        • 2.Rxd7#
      • 1...Kf6
        • 2.Qg6#
        • 2.Qxg7#
      • 1...Kxe8!
    • 1.Qxe5?
      • threat
        • 2.Qxg7#
      • 1...g5
        • 2.Qg7#
        • 2.f6#
      • 1...g6
        • 2.Qg7#
        • 2.f6#
      • 1...Rxe5!
    • 1.Qg5+?
      • 1...Kd6
        • 2.Rxd7#
      • 1...Bf6!
    • 1.Qxg7+?
      • 1...Kd6
        • 2.Rxd7#
        • 2.Qf8#
        • 2.Qxd7#
      • 1...Bxg7!
  • Keys
    • 1.exd7!
      • threat
        • 2.d8Q#
      • 1...Kd6
        • 2.d8Q#
        • 2.d8R#
      • 1...Kf6
        • 2.Qxg7#
      • 1...Rxd7
        • 2.Qxe5#
      • 1...Bc7
        • 2.Qxg7#
      • 1...Bb8
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(f);N_GUARD,N_SPINP(e),P_SPINB(c),S_CUTR(b),S_FLIGHT::R1(F),XP(e)
    • K(f);N_GUARD,N_SPINP(e),S_CUTB(c),S_FLIGHT::QAB1(B),XP(g)
  • Tries
    • Try
      • R(F);CHECK,XP(e)
      • Refutation
        • R(b);XR(F)
    • Try
      • R(G);CHECK
      • Vars
        • K(f);N_GUARD,N_SPINP(e),P_SPINB(c),S_FLIGHT::R1(F),XP(e)
      • Refutation
        • K(f);N_SPINP(e),P-FLIGHT,XR(G)
    • Try
      • Q(B);XB(c)
      • Threat
        • QAR2(B),XP(g)
      • Refutation
        • R(b);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(f);N_SPINP(e),P_SPINB(c),S_FLIGHT::R1(F),XP(e)
      • Refutation
        • B(c);P_SPINB(c)
    • Try
      • Q(B);CHECK,XP(g)
      • Refutation
        • B(c);XQ(B)
  • Actual
    • P(E);XP(e)
    • Threat
      • P=Q
    • Vars
      • K(f);P_SPINB(c),S_FLIGHT::P=Q
      • K(f);N_GUARD,S_CUTB(c),S_FLIGHT::QAB1(B),XP(g)
      • R(b);N_GUARD,P_SPINR(b),XP(E)::QAR2(B),XB(c)
      • B(c);N_GUARD::QAR2(B),XP(g)
      • B(c);N_GUARD::QAB(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).