MESON Chess Problem Database

Problem Display
PID: 21180 (q7/2b5/4p1R1/Rn1nk2b/1BQ3p1/2p1N3/4N3/6K1 w - - 0 1)

Guidelli, Giorgio

1st Prize, Good Companions (January), 1917

q7/2b5/4p1R1/Rn1nk2b/1BQ3p1/2p1N3/4N3/6K1

#2

7 + 9

3132 The Good Companion Two-Mover 1922
3391 Het Half Pin Thema 1947
6479 Problemschach (Sidler) 1968
5862 An ABC of Chess Problems 1970
3098 FIDE Album (1914-1944) (I) 1971
14744 Nuova Antologia dei Problemisti Italiani 1992
56 The Problemist 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Sa3
      • 2.Qd4#
      • 2.Qf4#
    • 1...Sd4
      • 2.Qxd4#
    • 1...Sd6
      • 2.Bxc3#
      • 2.Qd4#
      • 2.Qf4#
    • 1...Sa7
      • 2.Qd4#
      • 2.Qf4#
    • 1...Sxe3
      • 2.Qxe6#
    • 1...Sxb4
      • 2.Rxe6#
      • 2.Qxe6#
      • 2.Qd4#
      • 2.Qf4#
    • 1...Sf4
      • 2.Qd4#
      • 2.Qxf4#
    • 1...Sb6
      • 2.Rxe6#
      • 2.Qxe6#
      • 2.Qd4#
      • 2.Qf4#
    • 1...Sf6
      • 2.Rg5#
      • 2.Qd4#
      • 2.Qf4#
    • 1...Se7
      • 2.Rxe6#
      • 2.Qxe6#
      • 2.Qd4#
      • 2.Qf4#
  • Tries
    • 1.Sxg4+?
      • 1...Kf5
        • 2.Qd3#
      • 1...Bxg4!
    • 1.Rxb5?
      • threat
        • 2.Qd4#
        • 2.Qf4#
      • 1...Qa7
        • 2.Qf4#
      • 1...Qf8
        • 2.Qd4#
      • 1...Bb6
        • 2.Qf4#
      • 1...Qa1+!
  • Keys
    • 1.Sg3!
      • threat
        • 2.Qe4#
      • 1...Bxg6
        • 2.Sxg4#
      • 1...Sxe3
        • 2.Rxe6#
      • 1...Sxb4
        • 2.Rxe6#
      • 1...Sd4
        • 2.Qxc7#
      • 1...Sd6
        • 2.Bxc3#
      • 1...Sf4
        • 2.Qxc3#
      • 1...Sb6
        • 2.Rxe6#
      • 1...Sf6
        • 2.Rg5#
      • 1...Se7
        • 2.Rxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD,P_SPINS(d)::QAB1(E),XS(c)
    • S(d);OGATE,P_SPINS(c),XS(C)::QAR1(E),XP(g)
  • Tries
    • Try
      • S(C);CHECK,XP(b)
      • Vars
        • K(e);P-FLIGHT::QAB(E)
      • Refutation
        • B(f);XS(C)
    • Try
      • R(F);P_PINS(d),XS(c)
      • Threat
        • DUALS(2)
      • Vars
        • Q(i);P_PINS(C)::QAB1(E)
        • Q(i);::QAB1(E)
        • B(h);P_PINS(C)::QAB1(E)
      • Refutation
        • Q(i);CHECK
  • Actual
    • S(B);
    • Threat
      • QAR1(E)
    • Vars
      • B(f);N_GUARD,XR(G)::S(C),XP(b)
      • S(d);P_SPINS(c),XS(C)::R1(G),XP(g)
      • S(d);P_SPINS(c),XB(D)::R1(G),XP(g)
      • S(c);N_GUARD,P_SPINS(d),SBLOCK::QAB(E),XB(h)
      • S(c);N_GUARD,P_SPINS(d),SBLOCK::B(D),XP(a)
      • S(d);N_GUARD,P_SPINS(c),SBLOCK::QAB(E),XP(a)
      • S(d);P_SPINS(c)::R1(G),XP(g)
      • S(d);P_SPINS(c),SBLOCK::R(G)
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