MESON Chess Problem Database

Problem Display
PID: 21078 (8/8/1K1p4/1Q3p2/7B/R2Nk1N1/rP1p2Pp/1B1r2b1 w - - 0 1)

Guidelli, Giorgio

Good Companions (February), 1916

8/8/1K1p4/1Q3p2/7B/R2Nk1N1/rP1p2Pp/1B1r2b1

#2

9 + 8

3132 The Good Companion Two-Mover 1922
14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Tries
    • 1.Sf2+?
      • 1...Kxf2
        • 2.Qe2#
      • 1...Kd4
        • 2.Se2#
        • 2.Sxf5#
        • 2.Bf6#
        • 2.Rd3#
      • 1...Kf4
        • 2.Se2#
        • 2.Sh5#
        • 2.Rf3#
        • 2.Qxf5#
      • 1...Rxa3!
    • 1.Sxf5+?
      • 1...Ke2+
        • 2.Sc5#
      • 1...Ke4+!
    • 1.Qxf5?
      • threat
        • 2.Qe4#
        • 2.Qf4#
      • 1...Kd4
        • 2.Qe4#
      • 1...Rf1
        • 2.Qe4#
      • 1...d5
        • 2.Qf4#
        • 2.Qe5#
      • 1...Rxb2+!
  • Keys
    • 1.Se2!
      • threat
        • 2.Qe8#
      • 1...Kxe2+
        • 2.Sc5#
      • 1...Ke4+
        • 2.Sf2#
      • 1...Rxb2
        • 2.Sxb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(f);S_FLIGHT,XS(E)::QAR1(H)
      • Refutation
        • R(c);XR(D)
    • Try
      • S(F);CHECK,XP(g)
      • Vars
        • K(f);CHECK,P-FLIGHT::QAB(H)+S(E)
      • Refutation
        • K(f);CHECK,P-FLIGHT
    • Try
      • Q(H);XP(g)
      • Threat
        • DUALS(2)
      • Vars
        • K(f);S_FLIGHT::QAR1(H)
        • R(a);::QAR1(H)
      • Refutation
        • R(c);CHECK,XP(B)
  • Actual
    • S(F);
    • Threat
      • QAR(H)
    • Vars
      • K(f);CHECK,P-FLIGHT,XS(F)::QAB(H)+S(E)
      • K(f);CHECK,P-FLIGHT::B(A)+S(E),DCHECK
      • R(c);P_PINQ(H),XP(B)::R(D)+S(E),XR(c)
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