MESON Chess Problem Database

Problem Display
PID: 22027 (QrRq4/Brbn4/3ppp2/RB1kp3/n7/3P4/1N2N3/1K6 w - - 0 1)

ten Cate, Pieter

1st HM., Good Companions (July), 1923

QrRq4/Brbn4/3ppp2/RB1kp3/n7/3P4/1N2N3/1K6

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc8
      • 2.Qxb7#
    • 1...Bxa5
      • 2.Bc4#
      • 2.Bc6#
    • 1...Bb6
      • 2.Bc4#
      • 2.Bc6#
    • 1...Sxb2
      • 2.Sc3#
    • 1...Sc3+
      • 2.Sxc3#
    • 1...Sab6
      • 2.Bxd7#
    • 1...Sdb6
      • 2.Bxa4#
  • Tries
    • 1.Sd1?
      • threat
        • 2.Se3#
      • 1...Sc3+
        • 2.Sdxc3#
        • 2.Sexc3#
      • 1...Sab6
        • 2.Bxd7#
      • 1...Sdb6
        • 2.Bxa4#
      • 1...Bb6
        • 2.Bc4#
        • 2.Bc6#
      • 1...e4!
    • 1.Bxa4+?
      • 1...Bxa5
        • 2.Bb3#
        • 2.Bc6#
      • 1...Sc5!
    • 1.Bxd7+?
      • 1...Bxa5
        • 2.Bc6#
      • 1...Sc5!
    • 1.Rxc7?
      • threat
        • 2.Bc4#
        • 2.Bc6#
      • 1...Sc3+
        • 2.Sxc3#
      • 1...Qxc7!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Se3#
      • 1...Sc3+
        • 2.Sxc3#
      • 1...Sab6
        • 2.Bxd7#
      • 1...Sdb6
        • 2.Bxa4#
      • 1...Bb6
        • 2.Bc6#
      • 1...e4
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(j);N_GUARD,XR(I)::QAB(H),XR(g)
    • S(a);N_GUARD,XS(B)::S(C)
    • S(a);CHECK,N_GUARD::S(C),XS(a)
    • S(a);N_GUARD,S_CUTB(h)::R(E)+B(F),XS(i)
    • S(i);N_GUARD,S_CUTB(h)::R(E)+B(F),XS(a)
  • Tries
    • Try
      • S(B);P_SPINB(F)
      • Threat
        • S(B)
      • Vars
        • S(a);N_PINB(F)::R(E)+B(F),XS(i)
        • S(i);N_PINB(F)::R(E)+B(F),XS(a)
      • Refutation
        • P(c);
    • Try
      • B(F);CHECK,P_SPINS(B),XS(a)
      • Refutation
        • S(i);P_SPINS(i)
    • Try
      • B(F);CHECK,P_SPINS(B),XS(i)
      • Vars
        • B(h);XR(E)::B(F)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • R(I);XB(h)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);CHECK,N_GUARD::S(C),XS(a)
      • Refutation
        • Q(k);XR(I)
  • Actual
    • S(B);P_SPINB(F)
    • Threat
      • S(B)
    • Vars
      • S(a);CHECK,N_GUARD::S(C),XS(a)
      • S(a);N_PINB(F)::R(E)+B(F),XS(i)
      • S(i);N_PINB(F)::R(E)+B(F),XS(a)
      • B(h);N_PINB(F)::R(E)+B(F),DCHECK
      • P(c);N_GUARD::S(C)
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