MESON Chess Problem Database

Problem Display
PID: 227122 (2R5/1p6/1Pb4B/3Pp2B/4Pr2/Np1K4/qN4Rp/Qnk5 w - - 0 1)

Fastosky, Pedro

The Problemist, 1961

2R5/1p6/1Pb4B/3Pp2B/4Pr2/Np1K4/qN4Rp/Qnk5

#2

11 + 9

15601 Albrecht-Leiss-Degener Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb2
      • 2.Qxb2#
    • 1...h1S
      • 2.Rg1#
    • 1...h1B
      • 2.Rg1#
  • Tries
    • 1.Ke3?
      • threat
        • 2.Sd3#
      • 1...Rf3+
        • 2.Kxf3#
      • 1...Rxe4+
        • 2.Kxe4#
      • 1...Qxb2
        • 2.Qxb2#
      • 1...Rg4!
  • Keys
    • 1.Kc4!
      • threat
        • 2.Sd3#
      • 1...Bb5+
        • 2.Kxb5#
      • 1...Bxd5+
        • 2.Kxd5#
      • 1...Qxb2
        • 2.Qxb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(c);OGATE,XS(B)::QAB1(A),XQ(c)
    • P(d);N_GUARD::R(C)
  • Tries
    • Try
      • K(E);N_PINR(f),P-FLIGHT
      • Threat
        • S(B)
      • Vars
        • R(f);CHECK::B(J)+K(E),XR(f)
        • R(f);CHECK,XP(F)::B(J)+K(E),XR(f)
        • Q(c);OGATE,XS(B)::QAB1(A),XQ(c)
      • Refutation
        • R(f);
  • Actual
    • K(E);N_PINB(h),P_SPINP(F),S_FLIGHT
    • Threat
      • S(B)
    • Vars
      • B(h);CHECK::R(K)+K(E),XB(h)
      • B(h);CHECK,XP(G)::R(K)+K(E),XB(h)
      • Q(c);OGATE,XS(B)::QAB1(A),XQ(c)
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