MESON Chess Problem Database

Problem Display
PID: 143136 (8/2p2p2/5N1R/5k2/2N5/4K1p1/Q7/8 w - - 0 1)

McDowell, Michael

The Problemist Supplement, 2011

8/2p2p2/5N1R/5k2/2N5/4K1p1/Q7/8

#2

5 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Sd6+?
      • 1...Ke5
        • 2.Sg4#
        • 2.Sd7#
        • 2.Qd5#
      • 1...cxd6
        • 2.Qd5#
      • 1...Kg5!
    • 1.Qb1+?
      • 1...Ke6
        • 2.Qe4#
      • 1...Kg5!
    • 1.Qa1?
      • threat
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...Kg5!
    • 1.Qb2?
      • threat
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...Kg5!
    • 1.Qc2+?
      • 1...Ke6
        • 2.Qe4#
      • 1...Kg5!
    • 1.Qd2?
      • threat
        • 2.Qd5#
      • 1...Kg5
        • 2.Ke4#
      • 1...Ke6
        • 2.Qd7#
      • 1...c6!
    • 1.Qa5+?
      • 1...Ke6
        • 2.Qe5#
      • 1...c5!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qg4#
      • 1...Kg5
        • 2.Qh5#
      • 1...Ke6
        • 2.Kf4#

This is after

After V. Chepizhni.

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • P(c);XS(C)::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);S_FLIGHT::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);S_FLIGHT::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • K(b);P-FLIGHT::QAB(A)+K(B)
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(A)
      • Refutation
        • P(c);P_SPINP(c)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(b);P-FLIGHT::QAR1(A)
      • K(b);S_FLIGHT::QAR(A)+K(B)
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