MESON Chess Problem Database

Problem Display
PID: 140792 (3BbQ2/6np/Rq2r1kr/4p3/2N1P3/6N1/1p6/1K1B1R2 w - - 0 1)

Walters, S

The Problemist, 1938

3BbQ2/6np/Rq2r1kr/4p3/2N1P3/6N1/1p6/1K1B1R2

#2

9 + 9

3530 Het Half Pin Thema (II) 1947

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.Sxe5#
    • 1...Qf2
      • 2.Sxe5#
    • 1...Qe3
      • 2.Sxe5#
    • 1...Qa7
      • 2.Sxe5#
    • 1...Qb3
      • 2.Sxe5#
    • 1...Qb4
      • 2.Sxe5#
    • 1...Qb7
      • 2.Sxe5#
    • 1...Rc6
      • 2.Sxe5#
    • 1...Rd6
      • 2.Sxe5#
    • 1...Ba4
      • 2.Qf7#
    • 1...Bb5
      • 2.Qf7#
    • 1...Bc6
      • 2.Qf7#
    • 1...Bd7
      • 2.Qf7#
    • 1...Bf7
      • 2.Qxf7#
    • 1...Sf5
      • 2.exf5#
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qxg7#
      • 1...Sxf5
        • 2.exf5#
      • 1...Re7
        • 2.Rg1#
      • 1...Qa7
        • 2.Sxe5#
      • 1...Qc7
        • 2.Rg1#
      • 1...Qb7
        • 2.Sxe5#
        • 2.Rg1#
      • 1...Sh5
        • 2.Sh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 13
  • Sets
    • Q(c);P_SPINR(d)::S(E),XP(b)
    • R(d);N_GUARD::S(E),XP(b)
    • B(i);N_GUARD::QAB1(I)
    • B(i);N_GUARD::QAB1(I),XB(i)
    • S(g);OGATE::P(F),XS(g)
  • Actual
    • S(D);
    • Threat
      • QAR1(I),XS(g)
    • Vars
      • S(g);OGATE,XS(D)::P(F),XS(g)
      • R(d);P_SPINQ(c)::R(C)
      • Q(c);P_SPINR(d)::S(E),XP(b)
      • Q(c);N_GUARD,P_SPINR(d)::R(C)
      • S(g);S_CUTR(f)::S(D)
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Developed and maintained by Brian Stephenson.
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