MESON Chess Problem Database

Problem Display
PID: 66873 (1B1nB3/pn1N2p1/R2b2P1/2pk4/3p4/5P2/1KP1Q3/8 w - - 0 1)

Thornber, David

Chess, 1947

1B1nB3/pn1N2p1/R2b2P1/2pk4/3p4/5P2/1KP1Q3/8

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sa5
      • 2.Rxd6#
    • 1...Sc6
      • 2.Bf7#
    • 1...Sf7
      • 2.Bxf7#
    • 1...d3
      • 2.Qe4#
    • 1...c4
      • 2.Qe4#
  • Tries
    • 1.Kb3?
      • threat
        • 2.Qc4#
        • 2.Qe4#
      • 1...c4+
        • 2.Qxc4#
      • 1...d3
        • 2.Qe4#
      • 1...Sa5+!
    • 1.Bf7+?
      • 1...Se6
        • 2.Bxe6#
        • 2.Qxe6#
      • 1...Sxf7!
    • 1.c3?
      • threat
        • 2.c4#
      • 1...d3
        • 2.Qe4#
      • 1...Sa5
        • 2.Rxd6#
      • 1...c4
        • 2.Qe4#
      • 1...dxc3+!
  • Keys
    • 1.Qd3!
      • 1...Ke6
        • 2.Qe4#
      • 1...Bxb8
        • 2.c4#
      • 1...Bh2
        • 2.c4#
      • 1...Bg3
        • 2.c4#
      • 1...Bf4
        • 2.c4#
      • 1...Be5
        • 2.c4#
      • 1...Bc7
        • 2.c4#
      • 1...Be7
        • 2.c4#
      • 1...Bf8
        • 2.c4#
      • 1...Sa5
        • 2.Rxd6#
      • 1...Sc6
        • 2.Bf7#
      • 1...Se6
        • 2.c4#
      • 1...Sf7
        • 2.Bxf7#
      • 1...c4
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 1
  • Sets
    • S(f);N_GUARD::R1(E),XB(d)
    • S(h);N_GUARD::B(I)
    • S(h);N_GUARD::B(I),XS(h)
    • P(a);::QAB1(C)
    • P(b);SBLOCK::QAB1(C)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • P(b);CHECK::QAB1(C),XP(b)
        • P(a);::QAB1(C)
      • Refutation
        • S(f);CHECK
    • Try
      • B(I);CHECK
      • Refutation
        • S(h);XB(I)
    • Try
      • P(B);
      • Threat
        • P(B)
      • Vars
        • P(a);::QAB1(C)
        • S(f);N_GUARD::R1(E),XB(d)
        • P(b);SBLOCK::QAB1(C)
      • Refutation
        • P(a);CHECK,XP(B)
  • Actual
    • Q(C);P_PINP(a)
    • Vars
      • K(c);N_SPINP(a),P_SPINB(d),S_FLIGHT::QAR2(C)
      • B(d);XB(H)::P(B)
      • B(d);::P(B)
      • S(f);N_GUARD::R1(E),XB(d)
      • S(h);N_GUARD::B(I)
      • S(h);SBLOCK::P(B)
      • S(h);N_GUARD::B(I),XS(h)
      • P(b);SBLOCK::QAB1(C)
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