MESON Chess Problem Database

Problem Display
PID: 60829 (8/2p1Np2/Rb3krP/2Q1R3/6p1/1rp1n3/1p1B4/5nK1 w - - 0 1)

Guidelli, Giorgio

1st HM., Good Companions (March), 1918

8/2p1Np2/Rb3krP/2Q1R3/6p1/1rp1n3/1p1B4/5nK1

#2

7 + 11

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...c6
      • 2.Qd6#
  • Tries
    • 1.Rxe3?
      • threat
        • 2.Qe5#
        • 2.Qf5#
      • 1...Rxh6
        • 2.Qe5#
      • 1...b1Q
        • 2.Qe5#
      • 1...b1B
        • 2.Qe5#
      • 1...Rb5
        • 2.Bxc3#
      • 1...Rg5
        • 2.Qc6#
      • 1...Sg3
        • 2.Qe5#
      • 1...Sxe3!
    • 1.Rxb6+?
      • 1...cxb6
        • 2.Qd6#
      • 1...c6
        • 2.Rxc6#
        • 2.Qd6#
      • 1...Rxb6!
  • Keys
    • 1.Re4!
      • threat
        • 2.Qe5#
      • 1...Rb5
        • 2.Bxc3#
      • 1...Rg5
        • 2.Qc6#
      • 1...Sd1
        • 2.Qd4#
      • 1...Sc2
        • 2.Qf2#
      • 1...Sg2
        • 2.Qd4#
      • 1...Sc4
        • 2.Qf2#
      • 1...Sd5
        • 2.Qd4#
      • 1...Sf5
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • P(j);N_GUARD,N_SPINB(g)::QAR2(C)
  • Tries
    • Try
      • R(D);XS(e)
      • Threat
        • DUALS(2)
      • Vars
        • R(i);XP(F)::QAB1(C)
        • P(b);::QAB1(C)
        • R(c);N_GUARD::B(B),XP(d)
        • R(i);SBLOCK::QAR(C)
        • S(a);::QAB1(C)
      • Refutation
        • S(a);XR(D)
    • Try
      • R(E);CHECK,XB(g)
      • Vars
        • P(j);N_GUARD,XR(E)::QAR2(C)
      • Refutation
        • R(c);XR(E)
  • Actual
    • R(D);
    • Threat
      • QAB1(C)
    • Vars
      • R(c);N_GUARD::B(B),XP(d)
      • R(i);SBLOCK::QAR(C)
      • S(e);P_PINQ(C)::QAB(C)
      • S(e);OGATE,P_PINQ(C)::QAR(C)
      • S(e);N_GUARD,P_PINQ(C),SBLOCK::S(G)
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