MESON Chess Problem Database

Problem Display
PID: 235259 (8/N1Kp4/p7/k1Nb4/2BR4/Ppr1n3/3B4/b4Q2 w - - 0 1)

Heyl, Peter

Schach, 2011

8/N1Kp4/p7/k1Nb4/2BR4/Ppr1n3/3B4/b4Q2

#2

8 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...b2
      • 2.Bxc3#
  • Tries
    • 1.Bxb3?
      • threat
        • 2.Ra4#
        • 2.Qxa6#
      • 1...Bxb3
        • 2.Qxa6#
      • 1...Sxf1
        • 2.Ra4#
      • 1...Bc4
        • 2.Sb7#
      • 1...Bc6
        • 2.Qxa6#
      • 1...Bb7
        • 2.Ra4#
      • 1...Sc4!
  • Keys
    • 1.Bb5!
      • threat
        • 2.Ra4#
      • 1...axb5
        • 2.Qxb5#
      • 1...Sc4
        • 2.Sxb3#
      • 1...Bc4
        • 2.Sb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(b);S_CUTB(a)::B(B),XR(c)
  • Tries
    • Try
      • B(D);P_SPINS(F),XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(f);XB(D)::QAR1(A),XP(g)
        • S(d);XQ(A)::R1(E)
        • B(f);N_PINS(F)::S(F)
        • B(f);N_PINS(F)::QAR1(A),XP(g)
        • B(f);::R1(E)
      • Refutation
        • S(d);N_PINS(F)
  • Actual
    • B(D);P_SPINS(F)
    • Threat
      • R1(E)
    • Vars
      • P(g);OGATE,XB(D)::QAR1(A),XP(g)
      • S(d);N_PINS(F)::S(F),XP(b)
      • B(f);N_PINS(F)::S(F)
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