MESON Chess Problem Database

Problem Display
PID: 64029 (5bK1/5QNn/BRb2p2/2k3qR/1pN5/1P2PP2/5B2/3n4 w - - 0 1)

Guidelli, Giorgio

1st Prize, Good Companions (November), 1915

5bK1/5QNn/BRb2p2/2k3qR/1pN5/1P2PP2/5B2/3n4

#2

11 + 8

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Se6#
    • 1...Sb2
      • 2.e4#
    • 1...Sc3
      • 2.e4#
    • 1...Sxe3
      • 2.Bxe3#
  • Tries
    • 1.Qd5+?
      • 1...Kxd5
        • 2.e4#
      • 1...Qxd5+
        • 2.Se6#
      • 1...Bxd5+!
    • 1.Qc7?
      • threat
        • 2.Rb5#
        • 2.Qxc6#
      • 1...Qd5+
        • 2.Se6#
      • 1...Kd5
        • 2.Qxc6#
        • 2.e4#
      • 1...Sc3
        • 2.Qxc6#
        • 2.e4#
      • 1...Sxe3!
    • 1.Qe7+?
      • 1...Kd5
        • 2.e4#
      • 1...Bxe7!
    • 1.Qxf8+?
      • 1...Kd5
        • 2.Qd6#
        • 2.e4#
      • 1...Sxf8!
    • 1.e4+?
      • 1...Se3
        • 2.Bxe3#
      • 1...Sxf2!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Rb5#
      • 1...Qd5+
        • 2.Se6#
      • 1...Bd5+
        • 2.Re6#
      • 1...Kd5
        • 2.e4#
      • 1...Bxf3
        • 2.Rd6#
      • 1...Ba4
        • 2.Rd6#
      • 1...Be4
        • 2.Rd6#
      • 1...Bb5
        • 2.Rd6#
      • 1...Bb7
        • 2.Rd6#
      • 1...Bd7
        • 2.Rd6#
      • 1...Ba8
        • 2.Rd6#
      • 1...Be8
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 3
  • Sets
    • Q(d);N_PINS(J),P_PINQ(I)::S(J)
    • S(a);N_GUARD::B(A)+P(C)
    • S(a);OGATE,P_SPINS(a),XP(C)::B(A),XS(a)
  • Tries
    • Try
      • Q(I);CHECK,N_PINQ(d)
      • Vars
        • K(c);P-FLIGHT,P_SPINQ(d),XQ(I)::P(C)
        • Q(d);CHECK,N_PINS(J),P_SPINQ(d),XQ(I)::S(J)
      • Refutation
        • B(e);CHECK,XQ(I)
    • Try
      • Q(I);P_PINB(e)
      • Threat
        • DUALS(2)
      • Vars
        • Q(d);CHECK,N_PINS(J)::S(J)
      • Refutation
        • S(a);P_SPINS(a),XP(C)
    • Try
      • Q(I);CHECK
      • Vars
        • K(c);P-FLIGHT::P(C)
      • Refutation
        • B(h);XQ(I)
    • Try
      • Q(I);CHECK,XB(h)
      • Refutation
        • S(g);XQ(I)
    • Try
      • P(C);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::B(A),XS(a)
      • Refutation
        • S(a);XB(A)
  • Actual
    • Q(I);
    • Threat
      • QAB(I)+R(H),DCHECK
    • Vars
      • Q(d);CHECK,N_PINS(J)::S(J)
      • B(e);CHECK,N_SPINQ(d),OGATE,SBLOCK::QAB(I)+R(H)
      • K(c);P-FLIGHT::P(C)
      • B(e);OGATE,XP(D)::QAB(I)+R(H)
      • B(e);OGATE::QAB(I)+R(H)
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