MESON Chess Problem Database

Problem Display
PID: 121693 (5NBb/1p3p1r/1R1PR3/Ppk5/b2NP3/1p5q/1K1Q3p/6B1 w - - 0 1)

Stocchi, Ottavio

La Settimana Enigmistica, 1938

5NBb/1p3p1r/1R1PR3/Ppk5/b2NP3/1p5q/1K1Q3p/6B1

#2

11 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qg4
      • 2.Qc3#
    • 1...Qf5
      • 2.Qc3#
    • 1...Qc3+
      • 2.Qxc3#
    • 1...Qh4
      • 2.Qc3#
    • 1...Qh5
      • 2.Qc3#
    • 1...Qh6
      • 2.Qc3#
    • 1...Bxd4+
      • 2.Qxd4#
    • 1...b4
      • 2.Qxb4#
  • Tries
    • 1.Qc1+?
      • 1...Qc3+
        • 2.Qxc3#
      • 1...Kb4!
  • Keys
    • 1.Re7!
      • threat
        • 2.Rc7#
      • 1...Qc3+
        • 2.Qxc3#
      • 1...Bxd4+
        • 2.Qxd4#
      • 1...Kc4
        • 2.Rc7#
      • 1...Qd7
        • 2.Qc3#
      • 1...Qc8
        • 2.Qc3#
      • 1...b4
        • 2.Qxb4#
      • 1...f5
        • 2.Sd7#
      • 1...f6
        • 2.Sxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • Q(c);N_GUARD::QAR2(C)
    • Q(c);CHECK,N_GUARD,N_PINS(D)::QAR2(C),XQ(c)
    • B(j);CHECK,OGATE,P_SPINB(j),XS(D)::QAB1(C),XB(j)
    • P(e);::QAB1(C),XP(e)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • Q(c);CHECK,N_GUARD,N_PINS(D),P_SPINQ(c)::QAR2(C),XQ(c)
      • Refutation
        • K(f);P_SPINP(e),S_FLIGHT
  • Actual
    • R(I);
    • Threat
      • R(I)
    • Vars
      • Q(c);CHECK,N_GUARD,N_PINS(D)::QAR2(C),XQ(c)
      • B(j);CHECK,OGATE,P_SPINB(j),XS(D)::QAB1(C),XB(j)
      • K(f);P-FLIGHT,P_SPINP(h)::R(I)
      • Q(c);N_GUARD::QAR2(C)
      • P(e);::QAB1(C),XP(e)
      • P(h);S_CUTQ(c)::S(J)
      • P(h);N_PINS(D)::B(A)+S(D),DCHECK,XP(b)
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