MESON Chess Problem Database

Problem Display
PID: 261845 (2K5/8/4B3/1pQpN2N/p3k3/R1n5/p1r1p3/Bb2r3 w - - 0 1)

Shire, David J

The Problemist Supplement, 2022

2K5/8/4B3/1pQpN2N/p3k3/R1n5/p1r1p3/Bb2r3

#2

7 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.Qxd5#
  • Tries
    • 1.Rxc3?
      • threat
        • 2.Re3#
        • 2.Qe3#
        • 2.Qxd5#
      • 1...Kxe5
        • 2.Re3#
        • 2.Qxd5#
      • 1...Rd1
        • 2.Re3#
        • 2.Qe3#
      • 1...Rd2
        • 2.Re3#
        • 2.Qe3#
      • 1...d4
        • 2.Qd5#
      • 1...Rxc3!
    • 1.Qxd5+?
      • 1...Ke3
        • 2.Sg4#
      • 1...Sxd5+!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Qe3#
      • 1...Kd3
        • 2.Qxd5#
      • 1...Kf3
        • 2.Qxd5#
      • 1...Sd1
        • 2.Sgf6#
      • 1...d4
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(h);N_GUARD,P-FLIGHT,P_SPINP(j),P_SPINS(f),XS(D)::QAR1(C),XP(j)
  • Tries
    • Try
      • R(B);XS(f)
      • Threat
        • DUALS(3)
      • Vars
        • P(j);::QAB1(C)
      • Refutation
        • R(d);P_PINQ(C),XR(B)
    • Try
      • Q(C);CHECK,XP(j)
      • Vars
        • K(h);P-FLIGHT,P_SPINS(f)::S(D)
      • Refutation
        • S(f);CHECK,XQ(C)
  • Actual
    • S(D);
    • Threat
      • QAR1(C)
    • Vars
      • K(h);P_SPINS(f),S_FLIGHT::QAR2(C),XP(j)
      • K(h);P_SPINS(f),S_FLIGHT::QAB(C),XP(j)
      • S(f);P_PINQ(C)::S(D)
      • P(j);OGATE,SBLOCK::QAB1(C)
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