MESON Chess Problem Database

Problem Display
PID: 21085 (4Nb2/n7/5B2/Q2p4/2k5/7B/ppPp4/r4N1K w - - 0 1)

Guidelli, Giorgio

2nd HM., Good Companions (February), 1916

4Nb2/n7/5B2/Q2p4/2k5/7B/ppPp4/r4N1K

#2

7 + 8

15 British Chess Magazine 1916
3132 The Good Companion Two-Mover 1922
887 Mate in Two Moves 1931

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf1+
      • 2.Bxf1#
    • 1...Bd6
      • 2.Sxd6#
    • 1...Bh6
      • 2.Sd6#
    • 1...Bg7
      • 2.Sd6#
    • 1...b1S
      • 2.Se3#
    • 1...b1B
      • 2.Sxd2#
      • 2.Se3#
    • 1...d1S
      • 2.Sd2#
    • 1...d1B
      • 2.Sd2#
      • 2.Se3#
    • 1...d4
      • 2.Be6#
  • Tries
    • 1.Kh2?
      • threat
        • 2.Sxd2#
        • 2.Se3#
      • 1...Bd6+
        • 2.Sxd6#
      • 1...Rxf1
        • 2.Bxf1#
      • 1...b1S
        • 2.Se3#
      • 1...d1Q
        • 2.Se3#
      • 1...d1S
        • 2.Sd2#
      • 1...d1B
        • 2.Sd2#
        • 2.Se3#
      • 1...d1R
        • 2.Se3#
      • 1...Rd1
        • 2.Se3#
      • 1...Re1
        • 2.Sxd2#
      • 1...Bb4
        • 2.Se3#
      • 1...Bc5
        • 2.Sxd2#
      • 1...Bh6
        • 2.Sd6#
      • 1...d4
        • 2.Sxd2#
        • 2.Be6#
      • 1...Sb5!
    • 1.Qa4+?
      • 1...Kc5
        • 2.Bd4#
      • 1...Bb4!
  • Keys
    • 1.Sc7!
      • threat
        • 2.Qc3#
      • 1...Rxf1+
        • 2.Bxf1#
      • 1...Sb5
        • 2.Qxb5#
      • 1...b1S
        • 2.Se3#
      • 1...d1S
        • 2.Sd2#
      • 1...Bb4
        • 2.Qxd5#
      • 1...d4
        • 2.Be6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(a);CHECK,OGATE,XS(A)::B(D),XR(a)
    • B(h);N_GUARD::S(G),XB(h)
    • B(h);N_GUARD::S(G)
    • P(c);N_PINS(A)::S(A)
    • P(d);N_PINS(A)::S(A)
    • P(f);OGATEB::B(D)
  • Tries
    • Try
      • K(B);N_SPINS(A),P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • B(h);CHECK,N_GUARD::S(G),XB(h)
        • R(a);OGATE,XS(A)::B(D),XR(a)
        • P(c);::S(A)
        • P(d);::S(A)
        • R(a);::S(A)
        • R(a);::S(A),XP(d)
        • B(h);::S(A)
        • B(h);::S(A),XP(d)
        • B(h);N_GUARD::S(G)
      • Refutation
        • S(g);
    • Try
      • Q(E);CHECK
      • Vars
        • K(e);P-FLIGHT::B(F)
      • Refutation
        • B(h);P_SPINB(h)
  • Actual
    • S(G);
    • Threat
      • QAR1(E)
    • Vars
      • R(a);CHECK,OGATE,XS(A)::B(D),XR(a)
      • S(g);N_GUARD::QAB1(E),XS(g)
      • P(c);N_PINS(A)::S(A)
      • P(d);N_PINS(A)::S(A)
      • B(h);SBLOCK::QAB1(E),XP(f)
      • P(f);OGATEB::B(D)
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