MESON Chess Problem Database

Problem Display
PID: 184186 (8/4K3/2p1B1p1/4k3/1R1pP3/p3r3/Q5N1/8 w - - 0 1)

Rice, John Michael

Problem Observer, 2016

8/4K3/2p1B1p1/4k3/1R1pP3/p3r3/Q5N1/8

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Qa1#
    • 1...c5
      • 2.Qd5#
  • Tries
    • 1.Rb5+?
      • 1...cxb5
        • 2.Qd5#
      • 1...c5
        • 2.Qd5#
      • 1...Kxe4!
    • 1.Qd2?
      • threat
        • 2.Qxd4#
      • 1...Kxe4
        • 2.Qxe3#
      • 1...Rxe4
        • 2.Qg5#
      • 1...Rd3
        • 2.Qf4#
      • 1...d3
        • 2.Qc3#
      • 1...c5!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Qf4#
      • 1...Kxe4
        • 2.Qxe3#
      • 1...Rxe4
        • 2.Qf6#
      • 1...Rf3
        • 2.Qxd4#
      • 1...g5
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • P(c);OGATEB::QAB(A)
    • P(e);N_GUARD::QAR1(A)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • P(e);N_GUARD,XR(C)::QAR1(A)
        • P(e);N_GUARD,P_SPINP(e)::QAR1(A)
      • Refutation
        • K(d);P-FLIGHT,XP(D)
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XP(c)
      • Vars
        • K(d);OGATEB,P-FLIGHT,P_SPINP(c),XP(D)::QAR1(A),XR(b)
        • R(b);OGATE,SBLOCK,XP(D)::QAR2(A)
        • R(b);OGATE::QAB1(A)
        • P(c);OGATEB::QAB(A)
      • Refutation
        • P(e);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(d);OGATEB,P-FLIGHT,P_SPINP(c),XP(D)::QAR1(A),XR(b)
      • R(b);SBLOCK,XP(D)::QAB1(A)
      • R(b);OGATE::QAB1(A),XP(c)
      • P(f);N_GUARD::QAR1(A)
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