MESON Chess Problem Database

Problem Display
PID: 109033 (8/8/8/p7/kPr4R/N1P5/2P5/1K5Q w - - 0 1)

Myers, Arthur C

Toronto Globe, 1882

8/8/8/p7/kPr4R/N1P5/2P5/1K5Q

#2

7 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...axb4
      • 2.Qa8#
  • Tries
    • 1.Rxc4?
      • 1...axb4
        • 2.Qa8#
      • 1...Kxa3!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qxa5#
      • 1...Rxb4+
        • 2.Qb3#
      • 1...Kxa3
        • 2.Qxa5#
      • 1...axb4
        • 2.Qa8#
      • 1...Rc5
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB,XP(F)::QAR(B)
  • Tries
    • Try
      • R(G);XR(b)
      • Vars
        • P(c);OGATEB,P_SPINP(c),XP(F)::QAR(B)
      • Refutation
        • K(a);P-FLIGHT,XS(D)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B),XP(c)
    • Vars
      • R(b);CHECK,OGATE,P_SPINR(b),XP(F)::QAB1(B)
      • K(a);P-FLIGHT,XS(D)::QAR2(B),XP(c)
      • P(c);OGATEB,XP(F)::QAR(B)
      • R(b);OGATE::QAB1(B)
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