MESON Chess Problem Database

Problem Display
PID: 287102 (8/QK6/8/8/7p/7N/3N2pk/4B1Rr w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Problem Paradise, 2021

8/QK6/8/8/7p/7N/3N2pk/4B1Rr

#2

6 + 4

15601 Albrecht-Leiss-Degener Collection 2026

SOLUTION

  • SOUND
  • Tries
    • 1.Sf4?
      • threat
        • 2.Sf3#
        • 2.Rxg2#
      • 1...h3
        • 2.Sf3#
      • 1...Rxg1!
    • 1.Qf2?
      • threat
        • 2.Qxg2#
      • 1...Kxh3
        • 2.Qxh4#
        • 2.Qxg2#
      • 1...Rxg1!
    • 1.Qd4?
      • 1...Kxh3
        • 2.Qxh4#
      • 1...Rxg1!
    • 1.Qa4?
      • 1...Kxh3
        • 2.Qxh4#
      • 1...Rxg1!
  • Keys
    • 1.Sf2!
      • 1...Kxg1
        • 2.Sg4#
      • 1...Kg3
        • 2.Qb8#
      • 1...Rxg1
        • 2.Qb8#
      • 1...h3
        • 2.Sg4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);::S(C)
      • Refutation
        • R(a);XR(B)
    • Try
      • Q(E);P_PINP(b)
      • Threat
        • QAR1(E),XP(b)
      • Refutation
        • R(a);XR(B)
    • Try
      • Q(E);
      • Vars
        • K(c);OGATEB,P-FLIGHT,XS(D)::QAR1(E),XP(d)
      • Refutation
        • R(a);XR(B)
    • Try
      • Q(E);
      • Vars
        • K(c);OGATEB,P-FLIGHT,XS(D)::QAR1(E),XP(d)
      • Refutation
        • R(a);XR(B)
  • Actual
    • S(D);
    • Vars
      • K(c);N_GUARD,S_FLIGHT,XR(B)::QAB(E)+S(D)
      • K(c);N_GUARD,P_SPINP(b),S_FLIGHT::QAB(E)
      • R(a);SBLOCK,XR(B)::QAB(E)
      • P(d);SBLOCK::S(D)
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