MESON Chess Problem Database

Problem Display
PID: 259873 (4NK1n/Q4p2/2pNPRp1/3Pk3/1r1pP3/b2P4/8/8 w - - 0 1)

Novitski, Petr Adrinovich

Tolosa-100 MT (Problemas), 2016

4NK1n/Q4p2/2pNPRp1/3Pk3/1r1pP3/b2P4/8/8

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...g5
      • 2.Rf5#
  • Tries
    • 1.Qc5?
      • threat
        • 2.dxc6#
      • 1...cxd5
        • 2.Qxd5#
      • 1...Rb1
        • 2.Sc4#
      • 1...Rb2
        • 2.Sc4#
      • 1...Rb3
        • 2.Sc4#
      • 1...Rc4
        • 2.Sxc4#
      • 1...Rb5
        • 2.Sc4#
      • 1...Rb6
        • 2.Sc4#
      • 1...Rb7
        • 2.Sc4#
      • 1...Rb8
        • 2.Sc4#
      • 1...Ra4!
  • Keys
    • 1.Qe7!
      • threat
        • 2.exf7#
      • 1...fxe6
        • 2.Qxe6#
      • 1...Rb7
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(f);N_GUARD::R1(F)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAR(G)+P(C),XP(e)
      • Vars
        • P(e);OGATE,P_SPINP(e),XP(C)::QAR1(G),XP(e)
        • R(b);N_GUARD::S(D)
        • R(b);N_GUARD::S(D),XR(b)
        • R(b);N_GUARD,P_PINS(H)::S(D)
      • Refutation
        • R(b);
  • Actual
    • Q(G);
    • Threat
      • QAR(G)+P(E),XP(g)
    • Vars
      • P(g);OGATE,P_SPINP(g),XP(E)::QAR1(G),XP(g)
      • R(b);N_GUARD::S(D)
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