MESON Chess Problem Database

Problem Display
PID: 79578 (8/2p2nN1/p1n1Ppq1/4k3/4N3/B1PQ2P1/8/1K5B w - - 0 1)

Touw Hian Bwee

The Problemist, 1991

8/2p2nN1/p1n1Ppq1/4k3/4N3/B1PQ2P1/8/1K5B

#2

9 + 7

6352 A Collection of Chess Problems by Touw Hian Bwee 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Qxe4#
    • 1...Sb4
      • 2.Qd4#
    • 1...Sd4
      • 2.Qxd4#
    • 1...Sa5
      • 2.Qd4#
    • 1...Sa7
      • 2.Qd4#
    • 1...Se7
      • 2.Qd4#
    • 1...Sb8
      • 2.Qd4#
    • 1...Scd8
      • 2.Qd4#
    • 1...a5
      • 2.Qb5#
  • Tries
    • 1.Sc5?
      • threat
        • 2.Sd7#
      • 1...Qxd3+
        • 2.Sxd3#
      • 1...Qxg3
        • 2.Qxg3#
      • 1...Qxg7
        • 2.Qd5#
      • 1...Sb8!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Qc5#
      • 1...Qxe4+
        • 2.Qxe4#
      • 1...Kd5
        • 2.Qc5#
      • 1...Qxg3
        • 2.Sxg3#
      • 1...Qxg7
        • 2.Sd6#
      • 1...Sb4
        • 2.Qd4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Se7
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(e);OGATE,P_PINQ(E),XS(G)::QAR1(E),XQ(e)
    • S(c);N_GUARD::QAB1(E)
    • S(c);N_GUARD::QAB1(E),XS(c)
    • P(b);N_GUARD::QAR(E)
  • Tries
    • Try
      • S(G);P_SPINQ(E)
      • Threat
        • S(G)
      • Vars
        • Q(e);CHECK,XQ(E)::S(G),XQ(e)
        • Q(e);N_PINQ(E),XP(F)::QAB(E),XQ(e)
        • Q(e);N_PINQ(E),XS(I)::QAR1(E)
      • Refutation
        • S(c);
  • Actual
    • Q(E);P_SPINS(G)
    • Threat
      • QAR2(E)
    • Vars
      • Q(e);CHECK,OGATE,P_SPINQ(e),XS(G)::QAR1(E),XQ(e)
      • K(a);P-FLIGHT::QAR1(E)
      • Q(e);N_PINS(G),XP(F)::QAR(E)+S(G),XQ(e)
      • Q(e);N_PINS(G),XS(I)::QAR(E)+S(G)
      • S(c);N_GUARD::QAB1(E)
      • S(c);N_GUARD::QAB1(E),XS(c)
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