MESON Chess Problem Database

Problem Display
PID: 720 (5bb1/2K1p3/2p5/7r/k7/1q4R1/8/2QBB3 w - - 0 1)

Pritchard, DB

British Chess Magazine, 1943

5bb1/2K1p3/2p5/7r/k7/1q4R1/8/2QBB3

#2

5 + 7

15085 Australian Chess Forum 1996
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Kb5
      • 2.Qxc6#
    • 1...Rb5
      • 2.Qa1#
  • Tries
    • 1.Bxb3+?
      • 1...Kb5
        • 2.Qxc6#
      • 1...Bxb3!
    • 1.Rxb3?
      • threat
        • 2.Qa3#
        • 2.Qa1#
      • 1...Rh2
        • 2.Qa3#
        • 2.Qxc6#
      • 1...Bg7
        • 2.Qa3#
      • 1...e5
        • 2.Qxc6#
      • 1...e6
        • 2.Rb1#
        • 2.Rb6#
        • 2.Rb7#
        • 2.Rb8#
      • 1...Bxb3!
    • 1.Rg4+?
      • 1...Kb5
        • 2.Qxc6#
      • 1...Bc4!
    • 1.Qc5?
      • threat
        • 2.Qb4#
      • 1...Rh4
        • 2.Qa5#
      • 1...e5
        • 2.Qa5#
      • 1...e6
        • 2.Bxb3#
        • 2.Rg4#
      • 1...Rxc5!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qb4#
      • 1...Ka3
        • 2.Qa1#
      • 1...Kb5
        • 2.Qxc6#
      • 1...Rh4
        • 2.Qa5#
      • 1...Rb5
        • 2.Qa1#
      • 1...c5
        • 2.Qa5#
      • 1...e5
        • 2.Qa5#
      • 1...e6
        • 2.Qxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINQ(a),S_FLIGHT::QAB1(A),XP(d)
    • R(c);SBLOCK::QAR(A)
  • Tries
    • Try
      • B(B);CHECK,XQ(a)
      • Vars
        • K(b);S_FLIGHT::QAB1(A),XP(d)
      • Refutation
        • B(g);XB(B)
    • Try
      • R(D);XQ(a)
      • Threat
        • DUALS(2)
      • Vars
        • B(f);::QAR1(A)
        • P(e);S_CUTR(c)::QAB(A),XP(d)
      • Refutation
        • B(g);P_SPINB(g),XR(D)
    • Try
      • R(D);CHECK
      • Vars
        • K(b);N_SPINQ(a),S_FLIGHT::QAB1(A),XP(d)
      • Refutation
        • B(g);P_SPINB(g)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • R(c);N_GUARD,SBLOCK::QAR1(A)
        • P(e);S_CUTR(c)::QAR1(A)
      • Refutation
        • R(c);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(b);P-FLIGHT::QAR2(A)
      • K(b);N_SPINQ(a),S_FLIGHT::QAB1(A),XP(d)
      • R(c);N_GUARD,SBLOCK::QAR1(A)
      • R(c);SBLOCK::QAR(A)
      • P(d);S_CUTR(c)::QAR1(A)
      • P(e);S_CUTR(c)::QAR1(A)
      • P(e);S_CUTB(g)::QAB1(A),XQ(a)
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