MESON Chess Problem Database

Problem Display
PID: 78778 (1Q2R3/p2K1R1b/r2pN3/4k1p1/3n1n1r/1B3PP1/1N5B/8 w - - 0 1)

Touw Hian Bwee

3rd Prize, Problem (Zagreb), 1974

1Q2R3/p2K1R1b/r2pN3/4k1p1/3n1n1r/1B3PP1/1N5B/8

#2

10 + 9

6352 A Collection of Chess Problems by Touw Hian Bwee 2008
56 The Problemist 2008
102 Probleemblad 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qxd6#
    • 1...Ra2
      • 2.Qxd6#
    • 1...Ra3
      • 2.Qxd6#
    • 1...Ra4
      • 2.Qxd6#
    • 1...Ra5
      • 2.Qxd6#
    • 1...Sc6
      • 2.Qxd6#
    • 1...Sd5
      • 2.Sc4#
    • 1...Sxe6
      • 2.gxh4#
    • 1...Sg6
      • 2.Sd3#
    • 1...g4
      • 2.gxf4#
  • Tries
    • 1.Sxd4+?
      • 1...Kxd4
        • 2.Qb4#
      • 1...Se6!
    • 1.Sc5+?
      • 1...Sfe6
        • 2.gxh4#
      • 1...Sde6!
    • 1.Sxg5+?
      • 1...Sfe6
        • 2.gxh4#
      • 1...Sde6!
    • 1.Sc7+?
      • 1...Sfe6
        • 2.Sc4#
        • 2.gxh4#
      • 1...Sde6!
    • 1.Sg7+?
      • 1...Sfe6
        • 2.gxh4#
      • 1...Sde6!
    • 1.Sd8+?
      • 1...Sfe6
        • 2.gxh4#
      • 1...Sde6!
    • 1.Sf8+?
      • 1...Sfe6
        • 2.gxh4#
      • 1...Sde6!
    • 1.Qb5+?
      • 1...Sd5
        • 2.Sc4#
        • 2.Qxd5#
        • 2.gxh4#
      • 1...d5
        • 2.Sc4#
      • 1...Sxb5!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qxd4#
      • 1...Sxb3
        • 2.Sxf4#
      • 1...Sxf3
        • 2.Sxf4#
      • 1...Sdxe6
        • 2.Qc3#
      • 1...Sfxe6
        • 2.gxh4#
      • 1...Ra4
        • 2.Qxd6#
      • 1...Sc2
        • 2.Sxf4#
      • 1...Sde2
        • 2.Sxf4#
      • 1...Sb5
        • 2.Sxf4#
      • 1...Sf5
        • 2.Qe4#
      • 1...Sc6
        • 2.Qxd6#
      • 1...Sfe2
        • 2.Sxd4#
      • 1...Sg2
        • 2.Sxd4#
      • 1...Sd3
        • 2.Sxd4#
      • 1...Sh3
        • 2.Sxd4#
      • 1...Sd5
        • 2.Sc4#
      • 1...Sh5
        • 2.Sxd4#
      • 1...Sg6
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 5
  • Sets
    • R(f);N_GUARD::QAB1(I),XP(g)
    • S(a);S_CUTR(f)::QAB1(I),XP(g)
    • S(b);SBLOCK::S(A)
    • S(b);P_SPINS(b),XS(F)::B(B)+P(E),XR(c)
    • S(b);N_GUARD,S_CUTB(i)::S(A)
    • P(e);N_GUARD,S_CUTR(c)::P(E),XS(b)
  • Tries
    • Try
      • S(F);CHECK,XS(a)
      • Vars
        • K(d);N_SPINP(g),S_FLIGHT,XS(F)::QAR2(I)
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • S(F);CHECK
      • Vars
        • S(b);P_SPINS(b),S_CUTS(a)::B(B)+P(E),XR(c)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • S(F);CHECK,XP(e)
      • Vars
        • S(b);P_SPINS(b),S_CUTS(a)::B(B)+P(E),XR(c)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • S(F);CHECK,N_PINP(g)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • S(F);CHECK
      • Vars
        • S(b);P_SPINS(b),S_CUTS(a)::B(B)+P(E),XR(c)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • S(F);CHECK
      • Vars
        • S(b);P_SPINS(b),S_CUTS(a)::B(B)+P(E),XR(c)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • S(F);CHECK
      • Vars
        • S(b);P_SPINS(b),S_CUTS(a)::B(B)+P(E),XR(c)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(I);CHECK,N_PINP(g)
      • Vars
        • P(g);P_SPINP(g)::S(A)
      • Refutation
        • S(a);XQ(I)
  • Actual
    • Q(I);N_PINP(g)
    • Threat
      • QAB1(I),XS(a)
    • Vars
      • S(a);N_GUARD,XB(C)::R(J)+S(F),XS(b)
      • S(a);N_GUARD,XP(D)::R(J)+S(F),XS(b)
      • S(a);OGATEB,P_SPINS(a),XS(F)::QAB(I)
      • S(b);P_SPINS(b),XS(F)::B(B)+P(E),XR(c)
      • R(f);N_GUARD::QAB1(I),XP(g)
      • S(a);N_GUARD::R(J)+S(F),XS(b)
      • S(a);OGATE::QAR1(I)
      • S(a);S_CUTR(f)::QAB1(I),XP(g)
      • S(b);N_GUARD::R(J)+S(F),XS(a)
      • S(b);SBLOCK::S(A)
      • S(b);N_GUARD,S_CUTB(i)::S(A)
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