MESON Chess Problem Database

Problem Display
PID: 142034 (8/8/8/8/2pp2K1/Q1Bk4/n3R3/8 w - - 0 1)

Nield, Joshua

Bristol Mercury, 0000

8/8/8/8/2pp2K1/Q1Bk4/n3R3/8

#2

4 + 4

14867 BCPS Library 2011
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Kf3?
      • threat
        • 2.Rd2#
      • 1...dxc3
        • 2.Qd6#
      • 1...Sxc3!
    • 1.Bb4+?
      • 1...Kxe2
        • 2.Qf3#
      • 1...c3
        • 2.Qa6#
      • 1...Sc3!
    • 1.Rd2+?
      • 1...Ke3
        • 2.Qe7#
      • 1...Ke4!
    • 1.Qb2?
      • threat
        • 2.Qc2#
        • 2.Qd2#
      • 1...Sb4
        • 2.Qd2#
      • 1...dxc3!
    • 1.Qf8?
      • threat
        • 2.Qf3#
      • 1...Kxe2
        • 2.Qf3#
      • 1...Kxc3
        • 2.Qa3#
      • 1...dxc3!
    • 1.Qxa2?
      • threat
        • 2.Qc2#
        • 2.Qd2#
      • 1...Kxc3
        • 2.Qa3#
      • 1...dxc3!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Qf3#
      • 1...Kxe2
        • 2.Qf3#
      • 1...Kxc3
        • 2.Qa3#
      • 1...dxc3
        • 2.Qe4#

Anticipated by 220492(1875)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • R1(A)
      • Vars
        • P(d);OGATEB,P_SPINP(d),SBLOCK,XB(C)::QAR(B)
      • Refutation
        • S(a);P_SPINS(a),XB(C)
    • Try
      • B(C);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT,XR(A)::QAB1(B)
        • P(c);OGATEB,P_SPINP(c)::QAB(B)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • R(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAR1(B)
      • Refutation
        • P(d);XB(C)
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • K(b);S_FLIGHT,XR(A)::QAB1(B)
        • K(b);OGATEB,P-FLIGHT,XB(C)::QAR2(B)
      • Refutation
        • P(d);XB(C)
    • Try
      • Q(B);XS(a)
      • Threat
        • DUALS(2)
      • Vars
        • K(b);OGATEB,P-FLIGHT,XB(C)::QAR2(B)
      • Refutation
        • P(d);XB(C)
  • Actual
    • Q(B);
    • Threat
      • QAR2(B)
    • Vars
      • K(b);S_FLIGHT,XR(A)::QAB1(B)
      • K(b);OGATEB,P-FLIGHT,XB(C)::QAR2(B)
      • P(d);SBLOCK,XB(C)::QAB1(B)
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