MESON Chess Problem Database

Problem Display
PID: 196965 (1K3bnr/Q7/3pB3/2pPkbPR/1p3Np1/4P3/1R2pN2/B1r2q2 w - - 0 1)

Fegan, Bertram George

Brisbane Courier, 1919

1K3bnr/Q7/3pB3/2pPkbPR/1p3Np1/4P3/1R2pN2/B1r2q2

#2

11 + 12

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Rxb1#
    • 1...Re1
      • 2.Rb1#
    • 1...Bb1
      • 2.Rc2#
    • 1...Bc2
      • 2.Rb1#
    • 1...Bd3
      • 2.S4xd3#
    • 1...Be4
      • 2.Sxg4#
    • 1...Bg6
      • 2.Sxg6#
    • 1...c4
      • 2.Qd4#
  • Tries
    • 1.Rxb4+?
      • 1...Rc3
        • 2.Bxc3#
      • 1...Rxa1!
    • 1.Qg7+?
      • 1...Sf6
        • 2.Qxf6#
      • 1...Bxg7!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Qxf5#
      • 1...Bxe6
        • 2.Qxe6#
      • 1...Bb1
        • 2.Rc2#
      • 1...Bc2
        • 2.Rb1#
      • 1...Bd3
        • 2.S4xd3#
      • 1...Be4
        • 2.Sxg4#
      • 1...Bg6
        • 2.Sxg6#
      • 1...Bh7
        • 2.g6#
      • 1...Sf6
        • 2.Qxf6#
      • 1...Sh6
        • 2.Qf6#
      • 1...Se7
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • R(a);N_GUARD::B(A)+R(B),XR(a)
    • R(a);N_GUARD::B(A)+R(B)
    • B(h);S_CUTR(a)::B(A)+R(B)
    • B(h);N_GUARD::S(E),XB(h)
    • B(h);N_GUARD,SBLOCK::S(C),XP(e)
    • P(f);OGATE::QAB1(J)
  • Tries
    • Try
      • R(B);CHECK,XP(d)
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::B(A),XR(a)
      • Refutation
        • R(a);XB(A)
    • Try
      • Q(J);CHECK
      • Vars
        • S(k);N_GUARD,P_SPINS(k)::QAB1(J),XS(k)
      • Refutation
        • B(j);XQ(J)
  • Actual
    • Q(J);
    • Threat
      • QAR1(J),XB(h)
    • Vars
      • B(h);OGATE,XB(I)::QAR1(J),XB(h)
      • B(h);S_CUTR(a)::B(A)+R(B)
      • B(h);N_GUARD::S(E),XB(h)
      • B(h);N_GUARD,SBLOCK::S(C),XP(e)
      • B(h);::R(H)+P(G)
      • S(k);N_GUARD::QAB1(J),XS(k)
      • S(k);N_GUARD::QAB1(J)
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