MESON Chess Problem Database

Problem Display
PID: 261898 (B2RnR2/2N2Q2/2r1p1K1/4p3/q3k1p1/4P3/5P2/8 w - - 0 1)

Pirrone, Santi

The Australian Problemist, 1962

B2RnR2/2N2Q2/2r1p1K1/4p3/q3k1p1/4P3/5P2/8

#2

8 + 7

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Bxc6#
    • 1...Qa3
      • 2.Bxc6#
    • 1...Qb4
      • 2.Bxc6#
    • 1...Qa7
      • 2.Bxc6#
    • 1...g3
      • 2.Qf3#
  • Tries
    • 1.Sxe6?
      • threat
        • 2.Qf5#
      • 1...Sd6
        • 2.Sc5#
      • 1...Sf6
        • 2.Sg5#
      • 1...Sg7!
    • 1.Qh7?
      • threat
        • 2.Kg5#
        • 2.Kh5#
        • 2.Kh6#
        • 2.Qh1#
      • 1...Qd4
        • 2.Kg5#
        • 2.Kh5#
        • 2.Kh6#
      • 1...Sf6
        • 2.Qh1#
      • 1...Qd1
        • 2.Kg5#
        • 2.Kh5#
        • 2.Kh6#
      • 1...Qa1
        • 2.Kg5#
        • 2.Kh5#
        • 2.Kh6#
        • 2.Bxc6#
      • 1...Sg7
        • 2.Kxg7#
        • 2.Qh1#
      • 1...g3
        • 2.Kg5#
        • 2.Kh5#
        • 2.Kh6#
        • 2.Qh4#
      • 1...Sd6!
    • 1.f3+?
      • 1...gxf3
        • 2.Qxf3#
      • 1...Kxe3!
  • Keys
    • 1.Qxe6!
      • threat
        • 2.Rf4#
      • 1...Qd4
        • 2.Rxd4#
      • 1...Sd6
        • 2.Qd5#
      • 1...Sf6
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD::B(F),XR(e)
    • P(c);N_GUARD::QAB1(E)
  • Tries
    • Try
      • S(D);P_SPINS(D),XP(f)
      • Threat
        • QAB1(E)
      • Vars
        • S(g);N_PINS(D)::S(D)
      • Refutation
        • S(g);
    • Try
      • Q(E);
      • Threat
        • DUALS(4)
      • Vars
        • S(g);::QAB(E)
      • Refutation
        • S(g);
    • Try
      • P(A);CHECK
      • Vars
        • P(c);OGATE,XP(A)::QAB1(E),XP(c)
      • Refutation
        • K(b);N_SPINR(e),P-FLIGHT,XP(B)
  • Actual
    • Q(E);P_PINP(d),P_SPINQ(E),XP(f)
    • Threat
      • R1(H)
    • Vars
      • Q(a);N_GUARD::R1(G),XQ(a)
      • S(g);N_PINQ(E)::QAB1(E)
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