MESON Chess Problem Database

Problem Display
PID: 197725 (4r3/8/6b1/3R4/1n2k3/6Kp/2nQ4/B4N2 w - - 0 1)

Braithwaite, Kenneth Holmes

The Problemist, 1981

4r3/8/6b1/3R4/1n2k3/6Kp/2nQ4/B4N2

#2

5 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Rxe5#
    • 1...Ra8
      • 2.Re5#
    • 1...Rb8
      • 2.Re5#
    • 1...Rc8
      • 2.Re5#
    • 1...Rd8
      • 2.Re5#
    • 1...Rf8
      • 2.Re5#
    • 1...Rg8
      • 2.Re5#
    • 1...Rh8
      • 2.Re5#
    • 1...Sxa1
      • 2.Qd4#
    • 1...Se1
      • 2.Qd4#
    • 1...Sa3
      • 2.Qd4#
    • 1...Se3
      • 2.Qd4#
    • 1...Sd4
      • 2.Qxd4#
    • 1...Sa2
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sxd5
      • 2.Qxc2#
    • 1...Sa6
      • 2.Qd3#
    • 1...Sc6
      • 2.Qd3#
    • 1...h2
      • 2.Qg2#
  • Tries
    • 1.Qd1?
      • threat
        • 2.Qf3#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Rf8
        • 2.Re5#
      • 1...Se1
        • 2.Qd4#
      • 1...Bh5!
    • 1.Qe2+?
      • 1...Se3
        • 2.Qf3#
      • 1...Kxd5!
  • Keys
    • 1.Qg5!
      • threat
        • 2.Sd2#
      • 1...Sxd5
        • 2.Qxg6#
      • 1...Re5
        • 2.Qxe5#
      • 1...Bf5
        • 2.Qxf5#
      • 1...Sd4
        • 2.Rxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 16
  • Sets
    • R(f);N_GUARD::R1(E),XR(f)
    • R(f);N_GUARD::R1(E)
    • S(a);N_GUARD,XB(A)::QAR1(C)
    • S(a);N_GUARD::QAR1(C)
    • S(a);N_GUARD::QAR1(C),XS(a)
    • S(c);N_GUARD::QAB1(C)
    • S(c);N_GUARD::QAB1(C),XS(c)
    • S(c);N_GUARD,SBLOCK,XR(E)::QAB(C),XS(a)
    • P(b);N_GUARD::QAB(C)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • S(a);N_GUARD::QAR1(C),XS(a)
        • R(f);N_GUARD::R1(E)
        • S(a);N_GUARD::QAR1(C)
      • Refutation
        • B(e);
    • Try
      • Q(C);CHECK
      • Vars
        • S(a);P_SPINS(a)::QAB1(C)
      • Refutation
        • K(d);S_FLIGHT,XR(E)
  • Actual
    • Q(C);
    • Threat
      • S(B)
    • Vars
      • S(c);SBLOCK,XR(E)::QAB(C),XB(e)
      • R(f);N_GUARD::QAR1(C),XR(f)
      • B(e);N_GUARD::QAB1(C),XB(e)
      • S(a);N_GUARD::R1(E),XS(a)
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