MESON Chess Problem Database

Problem Display
PID: 222518 (8/6N1/5p1K/3Pp3/2P1k1p1/2r1Pr1p/2P1Q2N/1B6 w - - 0 1)

Allen, Frederick B

British Chess Magazine, 1930

8/6N1/5p1K/3Pp3/2P1k1p1/2r1Pr1p/2P1Q2N/1B6

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc2
      • 2.Bxc2#
    • 1...Ra3
      • 2.c3#
    • 1...Rb3
      • 2.cxb3#
    • 1...Rd3
      • 2.Qxd3#
      • 2.cxd3#
    • 1...Rxc4
      • 2.Qd3#
    • 1...Rxe3
      • 2.Qxg4#
    • 1...g3
      • 2.Qxf3#
  • Tries
    • 1.Se8?
      • threat
        • 2.Sd6#
      • 1...Kf5
        • 2.Sd6#
      • 1...Rxc4
        • 2.Qd3#
      • 1...Rfxe3
        • 2.Qxg4#
      • 1...Rcxe3!
  • Keys
    • 1.Sh5!
      • 1...Kf5
        • 2.e4#
      • 1...Rxc2
        • 2.Bxc2#
      • 1...Rcxe3
        • 2.c3#
      • 1...Rxc4
        • 2.Qd3#
      • 1...Rfxe3
        • 2.Qxg4#
      • 1...Rf1
        • 2.Sg3#
      • 1...Ra3
        • 2.c3#
      • 1...Rb3
        • 2.cxb3#
      • 1...Rd3
        • 2.Qxd3#
      • 1...Rf2
        • 2.Sg3#
      • 1...Rg3
        • 2.Sxg3#
      • 1...Rf4
        • 2.Sg3#
      • 1...Rf5
        • 2.Sg3#
      • 1...g3
        • 2.Qxf3#
      • 1...f5
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATE,P_SPINR(a),XP(B)::B(A),XR(a)
    • R(a);OGATE::B(A)+P(B)
    • R(a);OGATE::B(A)+P(B),XR(a)
    • R(a);N_GUARD,XP(F)::QAB1(C)
    • R(b);OGATE,P_SPINR(b),SBLOCK,XP(E)::QAR2(C),XP(e)
    • P(e);N_GUARD::QAB1(C),XR(b)
  • Tries
    • Try
      • S(I);
      • Threat
        • S(I)
      • Vars
        • K(d);S_FLIGHT::S(I)
        • R(a);N_GUARD,XP(F)::QAB1(C)
        • R(b);OGATE,P_SPINR(b),SBLOCK,XP(E)::QAR2(C),XP(e)
      • Refutation
        • R(a);P_SPINR(a),XP(E)
  • Actual
    • S(I);
    • Vars
      • K(d);OGATE,S_FLIGHT::P(E)
      • R(a);OGATE,P_SPINR(a),XP(B)::B(A),XR(a)
      • R(a);OGATE,P_SPINR(a),XP(E)::B(A)+P(B)
      • R(a);N_GUARD,XP(F)::QAB1(C)
      • R(b);OGATE,P_SPINR(b),SBLOCK,XP(E)::QAR2(C),XP(e)
      • R(b);N_GUARD::S(I)
      • R(a);OGATE::B(A)+P(B)
      • R(a);OGATE::B(A)+P(B),XR(a)
      • R(a);N_GUARD::QAB1(C),XR(a)
      • R(b);N_GUARD::S(I),XR(b)
      • P(e);N_GUARD::QAB1(C),XR(b)
      • P(g);SBLOCK,S_CUTR(b)::S(I)
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