MESON Chess Problem Database

Problem Display
PID: 145313 (2R1b3/3pRP2/2P1N3/2pkp3/3P4/6K1/2Q5/1N6 w - - 0 1)

Burgess, HJ

The Problemist, 1973

2R1b3/3pRP2/2P1N3/2pkp3/3P4/6K1/2Q5/1N6

#2

9 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qxc5#
    • 1...e4
      • 2.Qxc5#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Qxc5#
      • 1...Kd6
        • 2.Qxc5#
      • 1...cxd4
        • 2.Qc5#
      • 1...d6
        • 2.Qe4#
        • 2.Qc4#
      • 1...c4!
    • 1.Sf4+?
      • 1...Kxd4
        • 2.Qd3#
      • 1...Kd6
        • 2.Qxc5#
      • 1...exf4+!
    • 1.Rxd7+?
      • 1...Kxe6
        • 2.Qg6#
      • 1...Bxd7!
  • Keys
    • 1.fxe8S!
      • 1...cxd4
        • 2.S6c7#
      • 1...exd4
        • 2.Sf4#
      • 1...dxc6
        • 2.Rd8#
      • 1...dxe6
        • 2.Rd7#
      • 1...c4
        • 2.Sc3#
      • 1...e4
        • 2.Qxc5#
      • 1...d6
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • K(b);P-FLIGHT::QAB1(B),XP(a)
    • P(c);SBLOCK::QAR1(B),XP(a)
  • Tries
    • Try
      • S(A);
      • Threat
        • QAR1(B),XP(a)
      • Vars
        • K(b);P-FLIGHT::QAB1(B),XP(a)
        • P(a);XP(D)::QAR1(B)
      • Refutation
        • P(a);
    • Try
      • S(F);CHECK
      • Vars
        • K(b);P-FLIGHT,XP(D)::QAR1(B)
        • K(b);P-FLIGHT::QAB1(B),XP(a)
      • Refutation
        • P(c);CHECK,XS(F)
    • Try
      • R(G);CHECK,XP(d)
      • Vars
        • K(b);S_FLIGHT,XS(F)::QAR2(B)
      • Refutation
        • B(e);XR(G)
  • Actual
    • P(H);XB(e)
    • Vars
      • P(a);SBLOCK,XP(D)::S(F)
      • P(c);N_GUARD,SBLOCK,XP(D)::S(F)
      • P(d);OGATEB,SBLOCK,XP(E)::R(I)
      • P(d);SBLOCK,XS(F)::R(G)
      • P(a);SBLOCK::S(A)
      • P(c);SBLOCK::QAR1(B),XP(a)
      • P(d);SBLOCK::S(H)
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