MESON Chess Problem Database

Problem Display
PID: 4825 (4nR2/Q5p1/2R1B1P1/B2Pk1rp/1p4pK/np4N1/1N5P/2br4 w - - 0 1)

Blake, Percy Francis

Chess Monthly, 1892

4nR2/Q5p1/2R1B1P1/B2Pk1rp/1p4pK/np4N1/1N5P/2br4

#2

11 + 11

5454 Near Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Sd3#
    • 1...Rf1
      • 2.Sd3#
    • 1...Rg1
      • 2.Sd3#
    • 1...Rh1
      • 2.Sd3#
    • 1...Rd2
      • 2.Qe3#
    • 1...Rd3
      • 2.Sxd3#
    • 1...Rf5
      • 2.Rxf5#
    • 1...Rxg6
      • 2.Rf5#
    • 1...Bxb2
      • 2.Qe3#
    • 1...Bd2
      • 2.Sd3#
    • 1...Be3
      • 2.Qxe3#
    • 1...Sb1
      • 2.Sc4#
    • 1...Sc2
      • 2.Sc4#
    • 1...Sc4
      • 2.Sxc4#
    • 1...Sb5
      • 2.Sc4#
    • 1...Sd6
      • 2.Qxg7#
    • 1...Sf6
      • 2.Bc7#
    • 1...Sc7
      • 2.Bxc7#
  • Tries
    • 1.Bc7+?
      • 1...Sd6
        • 2.Bxd6#
      • 1...Sxc7!
    • 1.Qc7+?
      • 1...Kd4
        • 2.Bb6#
      • 1...Sd6
        • 2.Qxg7#
      • 1...Sxc7!
    • 1.Qxg7+?
      • 1...Sf6
        • 2.Qxf6#
      • 1...Sxg7!
  • Keys
    • 1.Bg8!
      • 1...Rxd5
        • 2.Re6#
      • 1...Rxg6
        • 2.Rf5#
      • 1...Bxb2
        • 2.Qe3#
      • 1...Rf5
        • 2.Rxf5#
      • 1...Sf6
        • 2.Bc7#
      • 1...Rd4
        • 2.Qe7#
      • 1...Re1
        • 2.Sd3#
      • 1...Rf1
        • 2.Sd3#
      • 1...Rg1
        • 2.Sd3#
      • 1...Rh1
        • 2.Sd3#
      • 1...Rd2
        • 2.Qe3#
      • 1...Rd3
        • 2.Sxd3#
      • 1...Bd2
        • 2.Sd3#
      • 1...Be3
        • 2.Qxe3#
      • 1...Bf4
        • 2.Rxe8#
      • 1...Sb1
        • 2.Sc4#
      • 1...Sc2
        • 2.Sc4#
      • 1...Sc4
        • 2.Sxc4#
      • 1...Sb5
        • 2.Sc4#
      • 1...Sd6
        • 2.Qxg7#
      • 1...Sc7
        • 2.Bxc7#

This anticipates 4953(1895)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(b);N_GUARD::S(A)
    • R(b);N_GUARD,P_PINP(B)::S(A)
    • R(b);S_CUTB(a)::QAR2(J)
    • R(b);N_GUARD::S(A),XR(b)
    • R(h);N_GUARD::R1(K),XR(h)
    • R(h);N_GUARD,XP(I)::R1(K)
    • B(a);N_GUARD,XS(A)::QAR2(J)
    • B(a);S_CUTR(b)::S(A)
    • B(a);N_GUARD::QAR2(J),XB(a)
    • S(c);N_GUARD::S(A)
    • S(c);N_GUARD::S(A),XS(c)
    • S(k);N_GUARD::QAB(J),XP(j)
    • S(k);N_GUARD::B(E)
    • S(k);N_GUARD::B(E),XS(k)
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • S(k);N_GUARD,P_SPINS(k)::B(E),XS(k)
      • Refutation
        • S(k);XB(E)
    • Try
      • Q(J);CHECK
      • Vars
        • K(g);S_FLIGHT::B(E)
        • S(k);N_GUARD,P_SPINS(k)::QAB(J),XP(j)
      • Refutation
        • S(k);XQ(J)
    • Try
      • Q(J);CHECK,XP(j)
      • Vars
        • S(k);N_GUARD,P_SPINS(k)::QAB1(J),XS(k)
      • Refutation
        • S(k);XQ(J)
  • Actual
    • B(H);
    • Vars
      • R(b);SBLOCK,XP(F)::R1(G)
      • R(h);N_GUARD,XP(I)::R1(K)
      • B(a);N_GUARD,XS(A)::QAR2(J)
      • R(h);N_GUARD::R1(K),XR(h)
      • S(k);N_GUARD::B(E)
      • R(b);SBLOCK::QAR2(J)
      • R(b);N_GUARD::S(A)
      • R(b);N_GUARD,P_PINP(B)::S(A)
      • R(b);S_CUTB(a)::QAR2(J)
      • R(b);N_GUARD::S(A),XR(b)
      • B(a);S_CUTR(b)::S(A)
      • B(a);N_GUARD::QAR2(J),XB(a)
      • B(a);SBLOCK::R(K),XS(k)
      • S(c);N_GUARD::S(A)
      • S(c);N_GUARD::S(A),XS(c)
      • S(k);N_GUARD::QAB(J),XP(j)
      • S(k);N_GUARD::B(E),XS(k)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).