MESON Chess Problem Database

Problem Display
PID: 135277 (4Q3/3N1p2/2ppn3/3k3n/r4R2/3P4/N3B3/bb1RK3 w - - 0 1)

Matthews, Robin CO

Probleemblad, 1951

4Q3/3N1p2/2ppn3/3k3n/r4R2/3P4/N3B3/bb1RK3

#2

8 + 9

14609 Mostly Three=Movers 1995

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa2
      • 2.Bf3#
    • 1...Ra3
      • 2.Sb4#
      • 2.Bf3#
    • 1...Rb4
      • 2.Sxb4#
    • 1...Rc4
      • 2.dxc4#
    • 1...Rd4
      • 2.Rf5#
    • 1...Re4
      • 2.dxe4#
    • 1...Ra5
      • 2.Sb4#
      • 2.Bf3#
    • 1...Ra6
      • 2.Sb4#
      • 2.Bf3#
    • 1...Ra7
      • 2.Sb4#
      • 2.Bf3#
    • 1...Ra8
      • 2.Sb4#
      • 2.Bf3#
    • 1...Bc3+
      • 2.Sxc3#
    • 1...Bd4
      • 2.Bf3#
    • 1...Sd4
      • 2.Qe4#
    • 1...Sc5
      • 2.Sb6#
  • Keys
    • 1.d4!
      • threat
        • 2.Sb6#
      • 1...Bc3+
        • 2.Sxc3#
      • 1...Rxd4
        • 2.Sb4#
      • 1...Bxd4
        • 2.Sc3#
      • 1...Shxf4
        • 2.Sf6#
      • 1...Sxd4
        • 2.Qxf7#
      • 1...Rb4
        • 2.Sxb4#
      • 1...Ra6
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(c);N_GUARD,XS(C)::B(D)
    • R(c);N_GUARD::S(C),XR(c)
    • R(c);OGATE::R(A)+P(E)DCHECK,XR(c)
    • R(c);SBLOCK,S_CUTB(a)::R(F)
    • R(c);OGATE,P_PINB(D)::R(A)+P(E)DCHECK,XR(c)
    • B(a);CHECK,N_GUARD::S(C),XB(a)
    • B(a);S_CUTR(c)::B(D)
    • S(h);OGATE::QAB1(H)
    • S(h);SBLOCK::S(G)
  • Actual
    • P(E);
    • Threat
      • S(G)
    • Vars
      • B(a);CHECK,N_GUARD::S(C),XB(a)
      • R(c);N_GUARD,P_SPINR(c),XP(E)::S(C)
      • B(a);N_GUARD,P_SPINB(a),XP(E)::S(C)
      • S(e);N_GUARD,XR(F)::S(G)
      • S(h);OGATEB,P_SPINS(h),XP(E)::QAB(H),XP(i)
      • R(c);N_GUARD::S(C),XR(c)
      • R(c);N_GUARD::S(C)
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