MESON Chess Problem Database

Problem Display
PID: 250464 (1Q3KR1/5p2/5p1k/8/7p/7r/8/7R w - - 0 1)

Voronin, Vladimir

Uralski Problemist, 2009

1Q3KR1/5p2/5p1k/8/7p/7r/8/7R

#2

4 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Rxh4#
    • 1...Rb3
      • 2.Rxh4#
    • 1...Rc3
      • 2.Rxh4#
    • 1...Rd3
      • 2.Rxh4#
    • 1...Re3
      • 2.Rxh4#
    • 1...Rf3
      • 2.Rxh4#
    • 1...Rg3
      • 2.Rxh4#
  • Tries
    • 1.Rxh3?
      • threat
        • 2.Rxh4#
      • 1...Kh7
        • 2.Rxh4#
      • 1...Kh5!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Rh8#
      • 1...Kh5
        • 2.Rh8#
      • 1...Kh7
        • 2.Qg7#
      • 1...Rxg3
        • 2.Rxh4#
      • 1...hxg3
        • 2.Rxh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • R(a);OGATE,P_SPINP(b)::R(A),XP(b)
  • Tries
    • Try
      • R(A);P_PINP(b),XR(a)
      • Threat
        • R(A),XP(b)
      • Vars
        • K(d);P-FLIGHT::R(A),XP(b)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • R(D)
    • Vars
      • K(d);P-FLIGHT::R(D)
      • K(d);N_GUARD,P-FLIGHT::QAR1(B)
      • R(a);OGATE,P_SPINP(b),XQ(B)::R(A),XP(b)
      • P(b);OGATEB,P_SPINR(a),XQ(B)::R(A),XR(a)
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