MESON Chess Problem Database

Problem Display
PID: 149778 (2K5/2R1pN2/8/8/1Q2q2k/5B1p/7P/4r3 w - - 0 1)

Heyl, Peter

Troll, 2013

2K5/2R1pN2/8/8/1Q2q2k/5B1p/7P/4r3

#2

6 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Qxe1#
    • 1...Qf4
      • 2.Qxf4#
    • 1...Qg4+
      • 2.Qxg4#
    • 1...Ra1
      • 2.Qxe4#
    • 1...Rb1
      • 2.Qxe4#
    • 1...Rc1
      • 2.Qxe4#
    • 1...Rd1
      • 2.Qxe4#
    • 1...Rf1
      • 2.Qxe4#
    • 1...Rh1
      • 2.Qxe4#
    • 1...e5
      • 2.Qe7#
    • 1...e6
      • 2.Qe7#
  • Tries
    • 1.Rc5?
      • threat
        • 2.Rh5#
      • 1...Qg4+
        • 2.Qxg4#
      • 1...Qc4
        • 2.Qxe1#
      • 1...Rc1
        • 2.Qxe4#
      • 1...e5!
  • Keys
    • 1.Rc6!
      • threat
        • 2.Rh6#
      • 1...Qg4+
        • 2.Qxg4#
      • 1...Qc4
        • 2.Qxe1#
      • 1...Rc1
        • 2.Qxe4#
      • 1...e6
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 7
  • Sets
    • Q(c);N_GUARD,P_PINR(D)::QAB(C),XR(a)
    • Q(c);OGATE::QAR2(C),XQ(c)
    • Q(c);CHECK,OGATE::QAR1(C),XQ(c)
    • R(a);N_GUARD::QAR(C),XQ(c)
    • R(a);N_GUARD,P_PINR(D)::QAR(C),XQ(c)
    • P(e);::QAB(C)
  • Tries
    • Try
      • R(D);
      • Threat
        • R1(D)
      • Vars
        • Q(c);CHECK,OGATE::QAR1(C),XQ(c)
        • Q(c);N_GUARD,P_PINR(D)::QAB(C),XR(a)
        • R(a);N_GUARD,P_PINR(D)::QAR(C),XQ(c)
      • Refutation
        • P(e);
  • Actual
    • R(D);
    • Threat
      • R(D)
    • Vars
      • Q(c);CHECK,OGATE::QAR1(C),XQ(c)
      • Q(c);N_GUARD,P_PINR(D)::QAB(C),XR(a)
      • R(a);N_GUARD,P_PINR(D)::QAR(C),XQ(c)
      • P(e);::QAB(C)
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