MESON Chess Problem Database

Problem Display
PID: 269422 (1R1R4/pNk5/1pp2p2/1P2q3/3p4/3Kp3/7B/8 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Problem Paradise, 2023

1R1R4/pNk5/1pp2p2/1P2q3/3p4/3Kp3/7B/8

#2

6 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qg3
      • 2.Bxg3#
    • 1...Qf4
      • 2.Bxf4#
    • 1...Qd6
      • 2.Bxd6#
    • 1...f5
      • 2.Bxe5#
  • Tries
    • 1.Sc5?
      • threat
        • 2.Sa6#
        • 2.Se6#
        • 2.Rbc8#
      • 1...cxb5
        • 2.Rbc8#
      • 1...a6
        • 2.Sxa6#
        • 2.Se6#
        • 2.Rbc8#
      • 1...bxc5!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Se8#
        • 2.Rbc8#
      • 1...Qe4+
        • 2.Sxe4#
      • 1...Qxb5+
        • 2.Sxb5#
      • 1...Qf5+
        • 2.Sxf5#
      • 1...Qxd6
        • 2.Bxd6#
      • 1...cxb5
        • 2.Rbc8#
      • 1...Qe6
        • 2.Se8#
      • 1...Qe8
        • 2.Sxe8#
        • 2.Rbc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • Q(c);OGATEB::B(A),XQ(c)
    • Q(c);OGATE::B(A),XQ(c)
    • P(f);N_GUARD::B(A),XQ(c)
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(3)
      • Vars
        • P(e);XP(C)::R1(E)
      • Refutation
        • P(d);XS(D)
  • Actual
    • S(D);N_PINQ(c)
    • Threat
      • DUALS(2)
    • Vars
      • Q(c);CHECK::B(A)+S(D),XQ(c)
      • Q(c);CHECK,XP(C)::B(A)+S(D),DCHECK,XQ(c)
      • Q(c);OGATE,P_SPINQ(c),XS(D)::B(A),XQ(c)
      • P(e);XP(C)::R1(E)
      • Q(c);::B(A)+S(D),DCHECK
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