MESON Chess Problem Database

Problem Display
PID: 274495 (1r6/1p6/2kBNN1n/Q3Pp2/2pK4/3n4/8/8 w - - 0 1)

Barnes, Barry Peter

The Problemist Supplement, 2023

1r6/1p6/2kBNN1n/Q3Pp2/2pK4/3n4/8/8

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rd8
      • 2.Sxd8#
    • 1...Sc1
      • 2.Qc5#
    • 1...Se1
      • 2.Qc5#
    • 1...Sb2
      • 2.Qc5#
    • 1...Sf2
      • 2.Qc5#
    • 1...Sb4
      • 2.Qc5#
    • 1...Sf4
      • 2.Qc5#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sxe5
      • 2.Qc5#
    • 1...b5
      • 2.Qc7#
    • 1...b6
      • 2.Qd5#
  • Tries
    • 1.Sc7?
      • threat
        • 2.Qb5#
      • 1...Sxe5
        • 2.Qc5#
      • 1...b6
        • 2.Qd5#
      • 1...b5!
    • 1.Bc5?
      • threat
        • 2.Qb6#
      • 1...Rd8+
        • 2.Sxd8#
      • 1...Sxc5
        • 2.Qxc5#
      • 1...b5
        • 2.Qc7#
      • 1...b6!
    • 1.Bc7?
      • threat
        • 2.Qb6#
        • 2.Qd5#
      • 1...Rd8+
        • 2.Sxd8#
      • 1...b6
        • 2.Qd5#
      • 1...Sb4
        • 2.Qb6#
        • 2.Qc5#
      • 1...Sf4
        • 2.Qb6#
        • 2.Qc5#
      • 1...Sc5
        • 2.Qb6#
        • 2.Qxc5#
      • 1...b5!
    • 1.Qa4+?
      • 1...Kb6
        • 2.Sd5#
        • 2.Sd7#
        • 2.Bc7#
      • 1...b5!
  • Keys
    • 1.Kc3!
      • threat
        • 2.Sd4#
      • 1...Sxe5
        • 2.Qc5#
      • 1...b5
        • 2.Qc7#
      • 1...b6
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 8
  • Sets
    • R(g);N_GUARD,P_PINB(D)::S(E),XR(g)
    • S(a);N_GUARD::QAR1(B)
    • S(a);N_GUARD::QAR1(B),XS(a)
    • S(a);N_GUARD,XP(C)::QAR1(B)
    • P(f);SBLOCK::QAR1(B)
    • P(f);SBLOCK::QAB1(B)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAB1(B)
      • Vars
        • S(a);N_GUARD,XP(C)::QAR1(B)
        • P(f);SBLOCK::QAB1(B)
      • Refutation
        • P(f);
    • Try
      • B(D);
      • Threat
        • QAR1(B)
      • Vars
        • R(g);CHECK,N_GUARD::S(E),XR(g)
        • S(a);OGATE,XB(D)::QAR1(B),XS(a)
        • P(f);SBLOCK::QAR1(B)
      • Refutation
        • P(f);
    • Try
      • B(D);
      • Threat
        • DUALS(2)
      • Vars
        • R(g);CHECK,N_GUARD::S(E),XR(g)
        • P(f);::QAB1(B)
      • Refutation
        • P(f);
    • Try
      • Q(B);CHECK
      • Refutation
        • P(f);P_SPINP(f)
  • Actual
    • K(A);S_FLIGHT
    • Threat
      • S(E)
    • Vars
      • S(a);N_GUARD,XP(C)::QAR1(B)
      • P(f);SBLOCK::QAR1(B)
      • P(f);SBLOCK::QAB1(B)
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