MESON Chess Problem Database

Problem Display
PID: 109737 (1B3R2/1B1p4/Q6K/3PPN1N/4k3/2pp3R/4n3/2n3b1 w - - 0 1)

Youngs, Joe Casey

Northwest Chess, 1975

1B3R2/1B1p4/Q6K/3PPN1N/4k3/2pp3R/4n3/2n3b1

#2

10 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bh2
      • 2.Re3#
    • 1...Be3+
      • 2.Rxe3#
    • 1...Sa2
      • 2.Qxd3#
    • 1...Sb3
      • 2.Qxd3#
  • Tries
    • 1.Rh4+?
      • 1...Sf4
        • 2.Rxf4#
      • 1...Kf3!
    • 1.Qc4+?
      • 1...Bd4
        • 2.Re3#
      • 1...Sd4!
    • 1.Qa4+?
      • 1...Bd4
        • 2.Re3#
      • 1...Sd4!
    • 1.Qg6?
      • threat
        • 2.Qg2#
      • 1...Be3+
        • 2.Rxe3#
      • 1...Sg3
        • 2.Qg4#
      • 1...Sd4
        • 2.Qg4#
      • 1...Sf4
        • 2.Sf6#
      • 1...d6!
  • Keys
    • 1.Qe6!
      • threat
        • 2.d6#
      • 1...Be3+
        • 2.Rxe3#
      • 1...dxe6
        • 2.dxe6#
      • 1...Sd4
        • 2.Sd6#
      • 1...Sf4
        • 2.Sf6#
      • 1...d6
        • 2.exd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • B(b);N_GUARD::R1(A)
    • B(b);CHECK,N_GUARD::R1(A),XB(b)
    • S(a);N_GUARD::QAB1(F),XP(e)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::R1(A),XS(c)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • B(b);P_SPINB(b)::R1(A)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • Q(F);CHECK
      • Vars
        • B(b);P_SPINB(b)::R1(A)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • Q(F);
      • Threat
        • QAB(F)
      • Vars
        • B(b);CHECK,N_GUARD::R1(A),XB(b)
        • S(c);N_GUARD::QAR2(F)
        • S(c);SBLOCK::S(E)
      • Refutation
        • P(g);
  • Actual
    • Q(F);
    • Threat
      • B(H)+P(B)
    • Vars
      • B(b);CHECK,N_GUARD::R1(A),XB(b)
      • P(g);OGATE,XQ(F)::B(H)+P(B),XP(g)
      • S(c);SBLOCK::S(D)
      • S(c);SBLOCK::S(E)
      • P(g);OGATE::QAR(F)+P(C),XP(g)
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