MESON Chess Problem Database

Problem Display
PID: 251602 (8/5r2/2B5/4p3/Q7/p2N3b/8/KR3Nk1 w - - 0 1)

Mlynka, Karol

Problemas, 2021

8/5r2/2B5/4p3/Q7/p2N3b/8/KR3Nk1

#2

6 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Ra7
      • 2.Qxa7#
    • 1...Bg4
      • 2.Qxg4#
  • Tries
    • 1.Qd4+?
      • 1...Rf2
        • 2.Qxf2#
      • 1...exd4!
    • 1.Qe4?
      • threat
        • 2.Qh1#
      • 1...Bg2
        • 2.Qxg2#
      • 1...Rf3!
    • 1.Qg4+?
      • 1...Bg2
        • 2.Qxg2#
      • 1...Bxg4!
    • 1.Qa7+?
      • 1...Rf2
        • 2.Qxf2#
      • 1...Rxa7!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Qh2#
      • 1...Rxf1
        • 2.Qf2#
      • 1...Bxf1
        • 2.Qg2#
      • 1...Bg2
        • 2.Qxg2#
      • 1...Rf2
        • 2.Qxf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • R(e);N_GUARD::QAB(E),XR(e)
    • B(c);N_GUARD::QAR(E),XB(c)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • R(e);N_GUARD,P_SPINR(e)::QAB1(E),XR(e)
      • Refutation
        • P(d);XQ(E)
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • B(c);N_GUARD::QAR1(E),XB(c)
      • Refutation
        • R(e);
    • Try
      • Q(E);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAR1(E),XB(c)
      • Refutation
        • B(c);XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • R(e);N_GUARD,P_SPINR(e)::QAB1(E),XR(e)
      • Refutation
        • R(e);XQ(E)
  • Actual
    • Q(E);
    • Threat
      • QAB1(E)
    • Vars
      • R(e);N_GUARD,P_PINR(B),P_SPINR(e),XS(C)::QAB1(E)
      • B(c);N_GUARD,P_SPINB(c),XS(C)::QAR1(E)
      • B(c);N_GUARD::QAR1(E),XB(c)
      • R(e);N_GUARD::QAB1(E),XR(e)
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