MESON Chess Problem Database

Problem Display
PID: 21320 (4R3/1qpP1P2/1p2Bp1p/5N1K/1R1Pk3/Q5p1/P1prr1Nb/8 w - - 0 1)

Sparke, Arthur M

Good Companions (December), 1918

4R3/1qpP1P2/1p2Bp1p/5N1K/1R1Pk3/Q5p1/P1prr1Nb/8

#2

11 + 11

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Rf2
      • 2.Qe3#
    • 1...Rxg2
      • 2.Qe3#
    • 1...Re3
      • 2.Qxe3#
    • 1...Bg1
      • 2.Sxg3#
    • 1...c5
      • 2.Sd6#
    • 1...c6
      • 2.Sd6#
  • Tries
    • 1.Kg4?
      • threat
        • 2.Bc4#
        • 2.Qf3#
      • 1...Rxd4
        • 2.Bc4#
      • 1...Qd5
        • 2.Qf3#
      • 1...Qc6
        • 2.Qf3#
      • 1...Qa8
        • 2.Qf3#
      • 1...Qc8
        • 2.Qf3#
      • 1...Qb8
        • 2.Qf3#
      • 1...Rd3
        • 2.Bb3#
        • 2.Bc4#
      • 1...Rf2
        • 2.Bc4#
        • 2.Qe3#
      • 1...Re3
        • 2.Bc4#
        • 2.Qxe3#
      • 1...h5+!
    • 1.Bd5+?
      • 1...Kxf5
        • 2.Qf3#
      • 1...Kxd5!
  • Keys
    • 1.Sfh4!
      • threat
        • 2.Qf3#
      • 1...Qd5+
        • 2.Bf5#
      • 1...Rxd4
        • 2.Bc4#
      • 1...Rd3
        • 2.Bb3#
      • 1...Rf2
        • 2.Qe3#
      • 1...Re3
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(c);N_GUARD::QAR1(C)
    • R(c);N_GUARD,XS(B)::QAR1(C)
    • R(c);N_GUARD::QAR1(C),XR(c)
    • B(d);N_GUARD::S(F),XP(e)
    • P(k);N_GUARD::S(F)
  • Tries
    • Try
      • K(G);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • R(b);P_SPINR(b),XP(E)::R(K)+B(H)
        • Q(j);::QAB1(C)
      • Refutation
        • P(i);CHECK
    • Try
      • B(H);CHECK
      • Vars
        • K(f);S_FLIGHT,XS(F)::QAR2(C)
      • Refutation
        • K(f);S_FLIGHT,XB(H)
  • Actual
    • S(F);
    • Threat
      • QAB1(C)
    • Vars
      • Q(j);CHECK,SBLOCK::R(K)+B(H),DCHECK
      • R(b);P_SPINR(b),SBLOCK,XP(E)::R(K)+B(H)
      • R(b);SBLOCK::R(K)+B(H)
      • R(c);N_GUARD::QAR1(C)
      • R(c);N_GUARD::QAR1(C),XR(c)
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