MESON Chess Problem Database

Problem Display
PID: 21091 (8/5pq1/1pPB1r1R/RN1k1pP1/B4P2/1P2pN2/1Q6/K7 w - - 0 1)

Foschini, Ettore

Good Companions (March), 1916

8/5pq1/1pPB1r1R/RN1k1pP1/B4P2/1P2pN2/1Q6/K7

#2

12 + 7

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Qe5#
    • 1...Rxd6
      • 2.Sc3#
  • Tries
    • 1.Sa7+?
      • 1...Kxd6
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...bxa5
        • 2.Qe5#
      • 1...b5
        • 2.Qe5#
      • 1...Ke4!
    • 1.Sc7+?
      • 1...Kxd6
        • 2.Qe5#
      • 1...Ke4!
    • 1.Qd4+?
      • 1...Ke6
        • 2.Sc7#
        • 2.Qe5#
        • 2.Qc4#
      • 1...Kxc6!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Sfd4#
      • 1...Rxd6+
        • 2.Sc3#
      • 1...Re6+
        • 2.Se5#
      • 1...Ke4
        • 2.Se1#
      • 1...Kxc6
        • 2.Se5#
      • 1...Ke6
        • 2.Sfd4#
      • 1...Qxg5
        • 2.Sxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(b);P_SPINR(e),S_FLIGHT::QAR1(B)
    • R(e);P_PINQ(B),XB(K)::R(G)+S(H),DCHECK
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINR(e),XB(K)::QAB1(B)
        • K(b);P_SPINR(e),S_FLIGHT::QAR1(B)
        • P(d);XR(G)::QAR1(B)
        • P(d);P_SPINP(d)::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(H);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINR(e),XB(K)::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(b);S_FLIGHT,XP(J)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)+S(D)
    • Vars
      • R(e);CHECK,XB(K)::R(G)+S(H),DCHECK
      • R(e);CHECK::QAB(B)+S(D)
      • K(b);S_FLIGHT::QAB(B)+S(D)
      • K(b);S_FLIGHT,XP(J)::QAB(B)+S(D),DCHECK
      • K(b);P_SPINR(e),S_FLIGHT::S(D)
      • Q(g);XP(I)::QAB(B)+S(D),XQ(g)
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