MESON Chess Problem Database

Problem Display
PID: 21331 (7K/N2p4/3Ppn2/Ppk2N1p/3R1Q1r/P1bP3p/8/2Rn4 w - - 0 1)

Guidelli, Giorgio

3rd Prize, Good Companions (February), 1918

7K/N2p4/3Ppn2/Ppk2N1p/3R1Q1r/P1bP3p/8/2Rn4

#2

10 + 10

3132 The Good Companion Two-Mover 1922
1085 Australian Chess Problem Magazine 1995

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2
      • 2.Rxc3#
    • 1...Se4
      • 2.Qe5#
    • 1...Sh7
      • 2.Qe5#
    • 1...Se8
      • 2.Qe5#
    • 1...Sg8
      • 2.Qe5#
    • 1...b4
      • 2.axb4#
  • Tries
    • 1.Rc4+?
      • 1...Kd5
        • 2.Se7#
      • 1...bxc4!
  • Keys
    • 1.Rb4!
      • threat
        • 2.Rxb5#
      • 1...Se4+
        • 2.Qe5#
      • 1...Sg4+
        • 2.Qd4#
      • 1...Sd5+
        • 2.d4#
      • 1...Sh7+
        • 2.Qe5#
      • 1...Se8+
        • 2.Qe5#
      • 1...Sg8+
        • 2.Qe5#
      • 1...Kd5
        • 2.Rxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD::R(A),XB(b)
    • S(i);N_GUARD,P_PINR(D)::QAR2(E)
    • P(e);OGATE::P(B),XP(e)
  • Tries
    • Try
      • R(D);CHECK,N_PINB(b)
      • Vars
        • K(f);P-FLIGHT::S(G)
      • Refutation
        • P(e);XR(D)
  • Actual
    • R(D);
    • Threat
      • R1(D),XP(e)
    • Vars
      • S(i);CHECK,N_GUARD::QAR2(E)
      • S(i);CHECK,S_CUTR(d)::QAB1(E)
      • S(i);CHECK,SBLOCK::P(C)
      • K(f);N_SPINB(b),P-FLIGHT::R(D),XP(e)
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