MESON Chess Problem Database

Problem Display
PID: 64651 (Qb5B/8/1p1p4/1r1P2K1/2P1kN2/5p2/2P2P1n/4n3 w - - 0 1)

Jordan, Gijsbertus

Good Companions (January), 1920

Qb5B/8/1p1p4/1r1P2K1/2P1kN2/5p2/2P2P1n/4n3

#2

8 + 8

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5+
      • 2.Qxd5#
    • 1...Ba7
      • 2.Qe8#
    • 1...Bc7
      • 2.Qe8#
    • 1...Sd3
      • 2.cxd3#
  • Tries
    • 1.Qc6?
      • threat
        • 2.Qe8#
      • 1...Rxd5+
        • 2.Qxd5#
      • 1...Sd3
        • 2.cxd3#
      • 1...Sg4!
    • 1.Qb7?
      • threat
        • 2.Qe7#
        • 2.Qh7#
      • 1...Rxd5+
        • 2.Qxd5#
      • 1...Sd3
        • 2.Qh7#
        • 2.cxd3#
      • 1...Sg4
        • 2.Qh7#
      • 1...Bc7!
    • 1.cxb5?
      • threat
        • 2.Qa4#
      • 1...Ba7
        • 2.Qe8#
      • 1...Sd3
        • 2.cxd3#
      • 1...Sxc2!
  • Keys
    • 1.Qa4!
      • threat
        • 2.cxb5#
      • 1...Rxd5+
        • 2.cxd5#
      • 1...Sxc2
        • 2.Qxc2#
      • 1...Rb1
        • 2.Qe8#
      • 1...Rb2
        • 2.Qe8#
      • 1...Rb3
        • 2.Qe8#
      • 1...Rb4
        • 2.Qe8#
      • 1...Ra5
        • 2.Qe8#
      • 1...Rc5
        • 2.Qe8#
      • 1...Sd3
        • 2.cxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • R(e);CHECK,OGATE,P_SPINR(e),XP(E)::QAB1(G),XR(e)
    • B(h);OGATE::QAR(G)
    • S(a);OGATE::P(A),XS(a)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAR(G)
      • Vars
        • R(e);CHECK,OGATE,P_SPINR(e),XP(E)::QAB1(G),XR(e)
        • S(a);OGATE::P(A),XS(a)
      • Refutation
        • S(b);
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • R(e);CHECK,OGATE,P_SPINR(e),XP(E)::QAB1(G),XR(e)
        • S(b);::QAB(G)
      • Refutation
        • B(h);
    • Try
      • P(C);N_SPINP(E),XR(e)
      • Threat
        • QAR(G)
      • Vars
        • B(h);OGATE::QAR(G)
        • S(a);OGATE::P(A),XS(a)
      • Refutation
        • S(a);XP(A)
  • Actual
    • Q(G);
    • Threat
      • QAR(G)+P(C),XR(e)
    • Vars
      • R(e);CHECK,OGATE,XP(E)::QAR(G)+P(C),XR(e)
      • S(a);OGATE,XP(A)::QAB(G),XS(a)
      • R(e);N_PINP(E),OGATE::QAR(G)
      • R(e);OGATE::QAR(G)
      • S(a);OGATE::P(A),XS(a)
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