MESON Chess Problem Database

Problem Display
PID: 125402 (K2R4/8/2k1N3/Q7/2q5/8/8/8 w - - 0 1)

Anonymous

Source?, 0000

K2R4/8/2k1N3/Q7/2q5/8/8/8

#2

4 + 2

3713 Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Sd4#
      • 2.Qc5#
    • 1...Qa2
      • 2.Sd4#
    • 1...Qe2
      • 2.Sd4#
      • 2.Qc5#
    • 1...Qb3
      • 2.Sd4#
      • 2.Qc5#
    • 1...Qd3
      • 2.Qc5#
    • 1...Qb5
      • 2.Qc7#
    • 1...Qd5
      • 2.Qa6#
    • 1...Qa6+
      • 2.Qxa6#
    • 1...Qc1
      • 2.Sd4#
      • 2.Qa6#
    • 1...Qc2
      • 2.Sd4#
      • 2.Qa6#
    • 1...Qc3
      • 2.Qa6#
    • 1...Qd4
      • 2.Sxd4#
    • 1...Qe4
      • 2.Qc5#
      • 2.Qa6#
    • 1...Qf4
      • 2.Qc5#
      • 2.Qa6#
    • 1...Qg4
      • 2.Qc5#
      • 2.Qa6#
    • 1...Qh4
      • 2.Qc5#
      • 2.Qa6#
    • 1...Qc5
      • 2.Qxc5#
  • Keys
    • 1.Ka7!
      • threat
        • 2.Qb6#
      • 1...Qa6+
        • 2.Qxa6#
      • 1...Qd4+
        • 2.Sxd4#
      • 1...Qc5+
        • 2.Qxc5#
      • 1...Qa2
        • 2.Sd4#
      • 1...Qb3
        • 2.Sd4#
        • 2.Qc5#
      • 1...Qb5
        • 2.Qc7#
      • 1...Qa4
        • 2.Qxa4#
      • 1...Qb4
        • 2.Qd5#

This anticipates 11541(1939)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(a);N_GUARD,P_PINQ(A)::S(B)
    • Q(a);N_GUARD::QAR1(A)
    • Q(a);SBLOCK::QAR1(A)
    • Q(a);N_GUARD::QAR2(A)
    • Q(a);CHECK,N_GUARD::QAR2(A),XQ(a)
    • Q(a);N_GUARD::S(B),XQ(a)
    • Q(a);N_GUARD::QAR1(A),XQ(a)
  • Actual
    • K(C);P-FLIGHT
    • Threat
      • QAR1(A)
    • Vars
      • Q(a);CHECK,N_GUARD::QAR2(A),XQ(a)
      • Q(a);CHECK,N_GUARD::S(B),XQ(a)
      • Q(a);CHECK,N_GUARD::QAR1(A),XQ(a)
      • Q(a);N_GUARD,P_PINQ(A)::S(B)
      • Q(a);SBLOCK::QAR1(A)
      • Q(a);N_GUARD,P_PINQ(A)::QAB(A),XQ(a)
      • Q(a);N_GUARD::QAB1(A)
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Developed and maintained by Brian Stephenson.
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