MESON Chess Problem Database

Problem Display
PID: 60636 (1b3Bn1/q2P3P/3pNR1n/4kp2/1Q3N1P/pB4r1/3P4/3K1R2 w - - 0 1)

Touw Hian Bwee

2nd HM., Schakend Nederland, 1968

1b3Bn1/q2P3P/3pNR1n/4kp2/1Q3N1P/pB4r1/3P4/3K1R2

#2

12 + 9

3751 FIDE Album (1968-1970) 1977
6352 A Collection of Chess Problems by Touw Hian Bwee 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Qxd4#
    • 1...Qa5
      • 2.Qd4#
    • 1...Qa6
      • 2.Qd4#
    • 1...Qb7
      • 2.Qd4#
    • 1...Qc7
      • 2.Qd4#
    • 1...Qxd7
      • 2.Qd4#
    • 1...Qa8
      • 2.Qd4#
  • Tries
    • 1.Sg5?
      • threat
        • 2.Re6#
      • 1...Kxf6
        • 2.h8Q#
        • 2.h8B#
      • 1...Sxf6
        • 2.Sg6#
      • 1...Qxd7!
    • 1.Sc7?
      • threat
        • 2.Re6#
      • 1...Kxf6
        • 2.Qxd6#
      • 1...Sxf6
        • 2.Bxd6#
      • 1...Rg6!
    • 1.Qc3+?
      • 1...Ke4
        • 2.Bd5#
      • 1...Qd4
        • 2.Qxd4#
      • 1...Rxc3!
    • 1.Qxd6+?
      • 1...Ke4
        • 2.Bd5#
        • 2.Qd5#
      • 1...Kxf6
        • 2.Sc7#
      • 1...Bxd6!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Re6#
      • 1...Kxf6
        • 2.Qd4#
      • 1...Qxd7
        • 2.Sxd7#
      • 1...Sxf6
        • 2.d4#
      • 1...Rg6
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • Q(g);N_GUARD,P_PINP(C)::QAB1(E),XQ(g)
    • Q(g);N_GUARD::QAB1(E)
    • Q(g);N_GUARD,XP(J)::QAB1(E)
  • Tries
    • Try
      • S(H);
      • Threat
        • R1(I)
      • Vars
        • K(c);S_FLIGHT,XR(I)::P=Q
        • S(i);SBLOCK,XR(I)::S(F)
      • Refutation
        • Q(g);XP(J)
    • Try
      • S(H);
      • Threat
        • R1(I)
      • Vars
        • K(c);S_FLIGHT,XR(I)::QAR2(E),XP(e)
        • S(i);SBLOCK,XR(I)::B(L),XP(e)
      • Refutation
        • R(b);
    • Try
      • Q(E);CHECK
      • Vars
        • K(c);P-FLIGHT::B(D)
        • Q(g);N_GUARD,P_PINP(C),P_SPINQ(g)::QAB1(E),XQ(g)
      • Refutation
        • R(b);XQ(E)
    • Try
      • Q(E);CHECK,XP(e)
      • Vars
        • K(c);S_FLIGHT,XR(I)::QAR(E)+S(H)
      • Refutation
        • B(h);XQ(E)
  • Actual
    • S(H);
    • Threat
      • R1(I)
    • Vars
      • K(c);S_FLIGHT,XR(I)::QAB(E)
      • Q(g);XP(J)::S(H),XQ(g)
      • S(i);SBLOCK,XR(I)::P(C)
      • R(b);N_GUARD::QAB(E)
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