MESON Chess Problem Database

Problem Display
PID: 138645 (8/1Q6/8/3nP1K1/Rp1bk3/1P2pR2/2PPp3/4B3 w - - 0 1)

Robbins, Alexander Henry

Mirror of American Sports, 1885

8/1Q6/8/3nP1K1/Rp1bk3/1P2pR2/2PPp3/4B3

#2

9 + 6

3530 Het Half Pin Thema (II) 1947

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf3
      • 2.Qxd5#
  • Tries
    • 1.Ra5?
      • threat
        • 2.Qxd5#
      • 1...Kxf3
        • 2.Qxd5#
      • 1...Kxe5
        • 2.Qxd5#
        • 2.Qe7#
      • 1...Bc5!
    • 1.Qh7+?
      • 1...Kxf3
        • 2.Qh1#
      • 1...Kxe5!
    • 1.d3+?
      • 1...Kxf3
        • 2.Qxd5#
      • 1...Kxe5!
  • Keys
    • 1.c4!
      • 1...Kd3
        • 2.Qh7#
      • 1...Kxf3
        • 2.Qxd5#
      • 1...Kxe5
        • 2.Qxd5#
      • 1...Bxe5
        • 2.Qxd5#
      • 1...exd2
        • 2.Qxd5#
      • 1...bxc4 ep
        • 2.Rxe3#
      • 1...Ba1
        • 2.Qxd5#
      • 1...Bb2
        • 2.Qxd5#
      • 1...Bc3
        • 2.Qxd5#
      • 1...Bc5
        • 2.Qxd5#
      • 1...Bb6
        • 2.Qxd5#
      • 1...Ba7
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • K(e);S_FLIGHT,XR(E)::QAB(I),XS(f)
  • Tries
    • Try
      • R(F);
      • Threat
        • QAB1(I),XS(f)
      • Vars
        • K(e);S_FLIGHT,XR(E)::QAB(I),XS(f)
      • Refutation
        • B(d);
    • Try
      • Q(I);CHECK,N_PINS(f)
      • Vars
        • K(e);OGATEB,S_FLIGHT,XR(E)::QAB(I)
      • Refutation
        • K(e);P-FLIGHT,XP(G)
    • Try
      • P(C);CHECK
      • Vars
        • K(e);S_FLIGHT,XR(E)::QAB(I),XS(f)
      • Refutation
        • K(e);N_SPINS(f),P-FLIGHT,XP(G)
  • Actual
    • P(B);
    • Vars
      • K(e);N_SPINS(f),P_SPINP(b),S_FLIGHT::QAB(I)
      • K(e);S_FLIGHT,XR(E)::QAB(I),XS(f)
      • K(e);N_SPINS(f),P-FLIGHT,XP(G)::QAR1(I),XS(f)
      • B(d);XP(G)::QAB1(I),XS(f)
      • P(b);XP(C)::QAB1(I),XS(f)
      • P(c);EP,P_SPINB(d),XP(B)::R1(E),XP(b)
      • B(d);::QAB1(I),XS(f)
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