MESON Chess Problem Database

Problem Display
PID: 85151 (5K2/8/1Np2Q2/BnkP4/p7/2p5/rR2pp2/4b3 w - - 0 1)

Fiodorov, V

Makaronets, Leonid

Pfeiffer MT, 1980

5K2/8/1Np2Q2/BnkP4/p7/2p5/rR2pp2/4b3

#2

6 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd4
      • 2.Qe7#
    • 1...cxd5
      • 2.Bb4#
  • Tries
    • 1.Qe7+?
      • 1...Sd6
        • 2.Qe3#
      • 1...Kd4!
  • Keys
    • 1.Rb4!
      • threat
        • 2.Rc4#
        • 2.Qxc6#
      • 1...cxd5
        • 2.Sd7#
      • 1...f1Q
        • 2.Rc4#
      • 1...f1R
        • 2.Rc4#
      • 1...Sa3
        • 2.Qe7#
        • 2.Qxc6#
      • 1...Sd4
        • 2.Qe7#
      • 1...Sd6
        • 2.Qd4#
      • 1...Sa7
        • 2.Qe7#
      • 1...Sc7
        • 2.Qe7#
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(g);N_GUARD,SBLOCK::QAB(E)
    • P(i);XP(C)::B(B)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • S(g);N_GUARD,P_SPINS(g),SBLOCK::QAB(E)
      • Refutation
        • K(h);S_FLIGHT
  • Actual
    • R(A);
    • Threat
      • DUALS(2)
    • Vars
      • P(i);SBLOCK,XP(C)::S(D)
      • P(d);P_PINQ(E)::R1(A)
      • S(g);N_GUARD::QAB(E)
      • S(g);N_GUARD,SBLOCK::QAB1(E)
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