MESON Chess Problem Database

Problem Display
PID: 7417 (3Q2B1/8/3n4/1p1N4/3k2P1/P2p2P1/3N4/4K3 w - - 0 1)

Surkov, Ruslan Albertovich

StrateGems, 1999

3Q2B1/8/3n4/1p1N4/3k2P1/P2p2P1/3N4/4K3

#2

8 + 4

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qb6#
    • 1...Ke5
      • 2.Qf6#
  • Keys
    • 1.Sb4!
      • 1...Kc3
        • 2.Qf6#
      • 1...Ke3
        • 2.Qb6#
      • 1...Kc5
        • 2.Sb3#
      • 1...Ke5
        • 2.Sc6#

This anticipates 150808(2007), 135883(2009)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAB1(G)
  • Actual
    • S(F);P_PINS(d)
    • Vars
      • K(b);N_SPINS(d),S_FLIGHT::QAB(G)
      • K(b);N_SPINS(d),S_FLIGHT::S(B)
      • K(b);N_SPINS(d),S_FLIGHT::S(F)
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