MESON Chess Problem Database

Problem Display
PID: 123046 (5B2/2N2p1K/5b2/pN6/2k3n1/2pnp3/P1b5/1RqR1Q2 w - - 0 1)

Youngs, Joe Casey

Northwest Chess, 1977

5B2/2N2p1K/5b2/pN6/2k3n1/2pnp3/P1b5/1RqR1Q2

#2

8 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bb3
      • 2.Qxd3#
      • 2.axb3#
    • 1...Ba4
      • 2.Qxd3#
    • 1...Bd4
      • 2.Qxf7#
    • 1...Bh4
      • 2.Qxf7#
    • 1...Be5
      • 2.Qxf7#
    • 1...Bg5
      • 2.Qxf7#
    • 1...Bg7
      • 2.Qxf7#
    • 1...Bd8
      • 2.Qxf7#
    • 1...Bh8
      • 2.Qxf7#
    • 1...a4
      • 2.Rb4#
  • Tries
    • 1.Sa3+?
      • 1...Kd4
        • 2.Qf4#
      • 1...Qxa3!
    • 1.Qf4+?
      • 1...Bd4
        • 2.Qxd4#
        • 2.Qxf7#
      • 1...Sxf4+!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Qd5#
      • 1...Be5
        • 2.Qxf7#
      • 1...Se1
        • 2.Sd6#
      • 1...Sb2
        • 2.Sa3#
      • 1...Sdf2
        • 2.Sd6#
      • 1...Sb4
        • 2.Sd6#
      • 1...Sf4
        • 2.Sd6#
      • 1...Sc5
        • 2.Sd6#
      • 1...Sde5
        • 2.Rd4#
      • 1...Sge5
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 8
  • Sets
    • B(b);N_GUARD::QAB1(C),XS(d)
    • B(i);OGATE::QAB(C),XP(j)
    • P(h);N_GUARD::R1(A)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(f);P-FLIGHT::QAR2(C)
      • Refutation
        • Q(a);XS(E)
    • Try
      • Q(C);CHECK,N_PINS(d)
      • Refutation
        • S(d);CHECK,XQ(C)
  • Actual
    • Q(C);N_PINS(d)
    • Threat
      • QAB1(C)
    • Vars
      • B(i);OGATE::QAB(C),XP(j)
      • S(d);P_PINQ(C)::S(E)
      • S(d);P_PINQ(C),S_CUTQ(a)::S(E)
      • S(d);OGATE,P_PINQ(C)::R1(B)
      • S(g);S_CUTB(i)::QAR2(C)
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