MESON Chess Problem Database

Problem Display
PID: 214494 (7K/6p1/6rk/6pp/4R3/8/3Q4/8 w - - 0 1)

Martindale, Frank W

American Chess Journal, 1877

7K/6p1/6rk/6pp/4R3/8/3Q4/8

#2

3 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...h4
      • 2.Rxh4#
  • Tries
    • 1.Re5?
      • 1...Ra6
        • 2.Qxg5#
      • 1...Rb6
        • 2.Qxg5#
      • 1...Rc6
        • 2.Qxg5#
      • 1...Rd6
        • 2.Qxg5#
      • 1...Re6
        • 2.Qxg5#
      • 1...Rf6
        • 2.Qxg5#
      • 1...h4!
  • Keys
    • 1.Rg4!
      • 1...hxg4
        • 2.Qh2#
      • 1...Ra6
        • 2.Qxg5#
      • 1...Rb6
        • 2.Qxg5#
      • 1...Rc6
        • 2.Qxg5#
      • 1...Rd6
        • 2.Qxg5#
      • 1...Re6
        • 2.Qxg5#
      • 1...Rf6
        • 2.Qxg5#
      • 1...h4
        • 2.Rxh4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB::R(B),XP(b)
  • Tries
    • Try
      • R(B);
      • Vars
        • R(c);N_GUARD,SBLOCK::QAB1(A),XP(a)
        • R(c);N_GUARD::QAB1(A),XP(a)
      • Refutation
        • P(b);
  • Actual
    • R(B);
    • Vars
      • P(b);OGATEB,XR(B)::QAR(A)
      • R(c);N_GUARD,SBLOCK::QAB1(A),XP(a)
      • R(c);N_GUARD::QAB1(A),XP(a)
      • P(b);OGATEB::R(B),XP(b)
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