MESON Chess Problem Database

Problem Display
PID: 15196 (8/8/3p3K/R4N2/5kP1/3r1PR1/3P4/7Q w - - 0 1)

Rice, John Michael

BCSC Starter, 1981-1982

8/8/3p3K/R4N2/5kP1/3r1PR1/3P4/7Q

#2

8 + 3

56 The Problemist 1981
5174 Chess Problem Spectrum 2003

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.dxe3#
    • 1...Rxf3
      • 2.Qxf3#
  • Tries
    • 1.Rh3?
      • threat
        • 2.Qh2#
      • 1...Rxf3
        • 2.Qxf3#
      • 1...Rxd2!
    • 1.Qb1?
      • 1...Rxd2
        • 2.Qe4#
      • 1...Rxf3
        • 2.Qb4#
      • 1...Rd5
        • 2.Qe4#
      • 1...d5
        • 2.Qb8#
      • 1...Ra3
        • 2.Qe4#
        • 2.Qb4#
      • 1...Rb3
        • 2.Qe4#
      • 1...Rc3
        • 2.Qe4#
      • 1...Re3
        • 2.dxe3#
      • 1...Rd4!
    • 1.Qe1?
      • threat
        • 2.Qe4#
      • 1...Rxf3
        • 2.Ra4#
      • 1...Rd4
        • 2.Qe3#
      • 1...Re3
        • 2.Qxe3#
        • 2.dxe3#
      • 1...d5!
    • 1.Qg1?
      • 1...Rxd2
        • 2.Qe3#
      • 1...Rxf3
        • 2.Qd4#
      • 1...Rd5
        • 2.Qe3#
      • 1...Rd4
        • 2.Qe3#
        • 2.Qxd4#
      • 1...Ra3
        • 2.Qd4#
      • 1...Rb3
        • 2.Qd4#
      • 1...Rc3
        • 2.Qd4#
      • 1...Re3
        • 2.Qxe3#
        • 2.dxe3#
      • 1...d5!
    • 1.Qh2?
      • threat
        • 2.Rh3#
      • 1...Rxd2
        • 2.Qxd2#
      • 1...Rxf3!
  • Keys
    • 1.Qc1!
      • 1...Rxd2
        • 2.Qxd2#
      • 1...Rxf3
        • 2.Qc4#
      • 1...Rd5
        • 2.d4#
      • 1...d5
        • 2.Qc7#
      • 1...Rd4
        • 2.d3#
      • 1...Ra3
        • 2.Qc4#
        • 2.d3#
      • 1...Rb3
        • 2.Qc4#
        • 2.d3#
      • 1...Rc3
        • 2.dxc3#
      • 1...Re3
        • 2.dxe3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATE::P(B),XR(a)
    • R(a);OGATE,XP(C)::QAR1(A),XR(a)
  • Tries
    • Try
      • R(D);
      • Threat
        • QAB(A)
      • Vars
        • R(a);OGATE,XP(C)::QAR1(A),XR(a)
      • Refutation
        • R(a);XP(B)
    • Try
      • Q(A);
      • Vars
        • R(a);OGATE,XP(B)::QAR1(A)
        • R(a);N_GUARD,XP(C)::QAR(A)
        • R(a);OGATE::QAR1(A)
        • P(c);OGATEB::QAB(A)
        • R(a);OGATE::P(B),XR(a)
      • Refutation
        • R(a);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • R(a);N_GUARD,XP(C)::R(F)
        • R(a);N_GUARD::QAB1(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Vars
        • R(a);N_GUARD,XP(B)::QAB1(A)
        • R(a);N_GUARD,XP(C)::QAR2(A)
        • R(a);N_GUARD::QAB1(A)
        • R(a);N_GUARD::QAR2(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Threat
        • QAB(A)+R(D)
      • Vars
        • R(a);OGATE,XP(B)::QAB(A),XR(a)
      • Refutation
        • R(a);XP(C)
  • Actual
    • Q(A);
    • Vars
      • R(a);OGATE,P_SPINR(a),XP(B)::QAB(A),XR(a)
      • R(a);N_GUARD,XP(C)::QAR(A)
      • R(a);OGATE::QAB(A)+P(B)
      • P(c);OGATEB::QAB(A)
      • R(a);OGATE::QAB(A)+P(B),XR(a)
      • R(a);OGATE::P(B),XR(a)
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