MESON Chess Problem Database

Problem Display
PID: 245403 (b7/2p5/3Bnp2/1Q3Pr1/2Npkpp1/1P6/4N3/1K1R1R2 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Hlas l'udu, 1987

(First published on Thu Oct 29 1987)

b7/2p5/3Bnp2/1Q3Pr1/2Npkpp1/1P6/4N3/1K1R1R2

#2

9 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sg7
      • 2.Rxd4#
      • 2.Rxf4#
    • 1...Sd8
      • 2.Rxd4#
      • 2.Rxf4#
    • 1...Sf8
      • 2.Rxd4#
      • 2.Rxf4#
    • 1...f3
      • 2.Sg3#
  • Keys
    • 1.Qe8!
      • threat
        • 2.Qxe6#
      • 1...Kd5
        • 2.Sc3#
      • 1...Kxf5
        • 2.Sg3#
      • 1...Rxf5
        • 2.Rxd4#
      • 1...Bd5
        • 2.Rxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(c);N_GUARD::S(D)
  • Actual
    • Q(G);P_PINS(f)
    • Threat
      • QAR2(G),XS(f)
    • Vars
      • K(b);N_SPINS(f),P_SPINP(a),S_FLIGHT::S(D)
      • K(b);N_SPINS(f),P_SPINP(c),S_FLIGHT,XP(H)::S(D)
      • R(e);SBLOCK,XP(H)::R1(B),XP(a)
      • B(i);SBLOCK::R1(C),XP(c)
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