MESON Chess Problem Database

Problem Display
PID: 201490 (8/6B1/1pR1B2K/1pq1PQ2/1P1k4/P3pP2/2Pp4/5b2 w - - 0 1)

Pasqualini, Giulio

L'Alfiere di Re, 1922

8/6B1/1pR1B2K/1pq1PQ2/1P1k4/P3pP2/2Pp4/5b2

#2

10 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb4
      • 2.Qe4#
      • 2.Qg4#
      • 2.Qf4#
    • 1...Qd6
      • 2.Qe4#
      • 2.Qg4#
      • 2.Qf4#
      • 2.c3#
      • 2.exd6#
    • 1...Qe7
      • 2.Qe4#
      • 2.Qg4#
      • 2.Qf4#
      • 2.c3#
    • 1...Qf8
      • 2.Qe4#
      • 2.c3#
    • 1...Qc3
      • 2.Rd6#
      • 2.Qe4#
      • 2.Qg4#
      • 2.Qf4#
    • 1...Qd5
      • 2.c3#
    • 1...Qxe5
      • 2.Bxe5#
      • 2.Qe4#
      • 2.Qg4#
      • 2.Qf4#
      • 2.Qxe5#
      • 2.c3#
    • 1...Bg2
      • 2.Qd3#
    • 1...Bd3
      • 2.Qxd3#
    • 1...Bh3
      • 2.Qd3#
    • 1...e2
      • 2.Qd3#
  • Tries
    • 1.c3+?
      • 1...Qxc3
        • 2.Rd6#
        • 2.Qe4#
      • 1...Kxc3!
  • Keys
    • 1.Bd5!
      • threat
        • 2.e6#
      • 1...Qd6+
        • 2.exd6#
      • 1...Kc3
        • 2.e6#
      • 1...Kxd5
        • 2.Qe4#
      • 1...Qxd5
        • 2.c3#
      • 1...e2
        • 2.Qd3#
      • 1...Qe7
        • 2.Qe4#
      • 1...Qf8
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • Q(f);N_GUARD::P(A)
    • B(a);N_GUARD::QAR1(F)
    • B(a);N_GUARD::QAR1(F),XB(a)
    • P(c);S_CUTB(a)::QAR1(F)
  • Tries
    • Try
      • P(A);CHECK
      • Refutation
        • K(d);P_SPINQ(f),S_FLIGHT,XP(A)
  • Actual
    • B(H);
    • Threat
      • B(J)+P(E)
    • Vars
      • Q(f);CHECK,OGATE::B(J)+P(E),XQ(f)
      • K(d);P_SPINQ(f),S_FLIGHT::B(J)+P(E)
      • K(d);P-FLIGHT,XB(H)::QAB1(F)
      • Q(f);N_GUARD,SBLOCK,XB(H)::P(A)
      • P(c);S_CUTB(a)::QAR1(F)
      • Q(f);::QAR1(F)
      • Q(f);P_PINB(J)::QAR1(F)
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