MESON Chess Problem Database

Problem Display
PID: 261319 (8/QK1p4/2PPpp1R/3Pk3/3p4/B7/4pR2/7B w - - 0 1)

Lider, Valentin Viktorovich

Neue Zurcher Zeitung, 1986

8/QK1p4/2PPpp1R/3Pk3/3p4/B7/4pR2/7B

#2

9 + 6

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Qe3#
  • Tries
    • 1.Rh4?
      • threat
        • 2.Qxd4#
      • 1...d3
        • 2.Qe3#
        • 2.Qd4#
      • 1...exd5!
  • Keys
    • 1.Qa5!
      • 1...exd5
        • 2.Qxd5#
      • 1...dxc6
        • 2.dxc6#
      • 1...d3
        • 2.Qc3#
      • 1...e1Q
        • 2.Qxe1#
      • 1...e1S
        • 2.Qxe1#
      • 1...e1B
        • 2.Qxe1#
      • 1...e1R
        • 2.Qxe1#
      • 1...f5
        • 2.dxe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATE::QAR2(H)
  • Tries
    • Try
      • R(G);
      • Threat
        • QAB1(H),XP(b)
      • Refutation
        • P(d);XP(D)
  • Actual
    • Q(H);
    • Vars
      • P(d);OGATE,P_SPINP(d),XP(D)::QAR1(H),XP(d)
      • P(f);OGATE,XP(E)::QAR(H)+P(D),XP(f)
      • P(b);OGATEB::QAB(H)
      • P(a);OGATEB::QAR(H),XQ(a)
      • P(a);OGATEB::QAR(H),XS(a)
      • P(a);OGATEB::QAR(H),XB(a)
      • P(a);OGATEB::QAR(H),XR(a)
      • P(e);::QAR(H)+P(D),XP(d)
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