MESON Chess Problem Database

Problem Display
PID: 123361 (1br1b3/1p1R1p2/1Q1n4/2Pnp2R/N1Nk4/3P4/2P2P1K/8 w - - 0 1)

Ruszczynski, Piotr

Schach, 1971

1br1b3/1p1R1p2/1Q1n4/2Pnp2R/N1Nk4/3P4/2P2P1K/8

#2

10 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc5
      • 2.Qxc5#
    • 1...Sb5
      • 2.c6#
    • 1...Sf5
      • 2.Qb2#
      • 2.c6#
  • Tries
    • 1.cxd6+?
      • 1...Rc5
        • 2.Qxc5#
      • 1...Sxb6!
  • Keys
    • 1.Sxe5!
      • threat
        • 2.Sf3#
      • 1...Sf5
        • 2.Qb2#
      • 1...Sc4
        • 2.c3#
      • 1...Se4
        • 2.Qb4#
      • 1...Sb5
        • 2.c6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(h);OGATE,P_SPINR(h),XP(G)::QAB1(I),XR(h)
    • S(d);P_SPINS(b)::QAB(I)+P(G)
  • Tries
    • Try
      • P(G);CHECK,XS(d)
      • Vars
        • R(h);N_GUARD,P_SPINR(h)::QAB1(I),XR(h)
      • Refutation
        • S(b);XQ(I)
  • Actual
    • S(F);XP(c)
    • Threat
      • S(F)
    • Vars
      • S(d);P_PINS(F),P_SPINS(b)::QAB(I)
      • S(d);P_PINS(F),P_SPINS(b)::P(A)
      • S(d);N_GUARD,P_PINS(F),P_SPINS(b)::QAR2(I)
      • S(d);P_PINS(F),P_SPINS(b)::QAB(I)+P(G)
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