MESON Chess Problem Database

Problem Display
PID: 256545 (3N2b1/3B1n1q/2N3r1/r2k1Pb1/p1pP1P2/B7/3R4/KQ6 w - - 0 1)

Barnes, Barry Peter

Lipton, Michael

The Problemist, 2021

3N2b1/3B1n1q/2N3r1/r2k1Pb1/p1pP1P2/B7/3R4/KQ6

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qh1
      • 2.Qxh1#
    • 1...Qg7
      • 2.Qh1#
    • 1...Rc5
      • 2.dxc5#
    • 1...Rxc6
      • 2.Bxc6#
    • 1...Rd6
      • 2.Sb4#
    • 1...Re6
      • 2.Bxe6#
    • 1...Rf6
      • 2.Se7#
    • 1...Rg7
      • 2.Be6#
    • 1...Bxf4
      • 2.Se7#
    • 1...Bf6
      • 2.Be6#
    • 1...Bh6
      • 2.Se7#
    • 1...Be7
      • 2.Sxe7#
    • 1...Se5
      • 2.dxe5#
    • 1...Sd6
      • 2.Sb4#
    • 1...Sh6
      • 2.Qh1#
  • Tries
    • 1.Re2?
      • threat
        • 2.Qe4#
      • 1...c3
        • 2.Qa2#
      • 1...Qh1
        • 2.Qxh1#
      • 1...Re6
        • 2.Bxe6#
      • 1...Sd6
        • 2.Re5#
      • 1...Rc5!
  • Keys
    • 1.f6!
      • threat
        • 2.Se7#
        • 2.Be6#
      • 1...Rxf6
        • 2.Se7#
      • 1...Bxf6
        • 2.Be6#
      • 1...Sxd8
        • 2.Qf5#
      • 1...Rc5
        • 2.dxc5#
      • 1...c3
        • 2.Be6#
      • 1...Qh3
        • 2.Se7#
      • 1...Se5
        • 2.dxe5#
      • 1...Sd6
        • 2.Sb4#
      • 1...Sh6
        • 2.Qh1#
      • 1...Sh8
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • Q(h);N_GUARD,P_PINQ(B)::QAB(B),XQ(h)
    • Q(h);N_GUARD,P_PINP(E)::QAB(B)
    • R(c);OGATE::R(C)+P(E),XR(c)
    • R(f);OGATE,XS(H)::B(I),XR(f)
    • R(f);SBLOCK::S(H)
    • R(f);N_GUARD::B(I),XR(f)
    • R(f);S_CUTB(e)::S(H)
    • R(f);N_GUARD::B(I)
    • B(e);N_GUARD,XP(F)::S(H)
    • B(e);P_PINP(E),S_CUTR(f)::B(I)
    • B(e);N_GUARD::S(H)
    • B(e);N_GUARD::S(H),XB(e)
    • S(g);OGATE::R(C)+P(E),XS(g)
    • S(g);SBLOCK::S(H)
    • S(g);S_CUTQ(h)::QAB(B)
  • Tries
    • Try
      • R(C);
      • Threat
        • QAB1(B)
      • Vars
        • P(b);OGATEB::QAB(B)
        • Q(h);N_GUARD,P_PINQ(B)::QAB(B),XQ(h)
        • R(f);N_GUARD::B(I),XR(f)
        • S(g);N_GUARD::R1(C)
      • Refutation
        • R(c);
  • Actual
    • P(G);
    • Threat
      • DUALS(2)
    • Vars
      • R(f);XP(G)::S(H)
      • B(e);P_PINP(E),XP(G)::B(I)
      • S(g);N_GUARD,XS(J)::QAR2(B)
      • R(c);OGATE::R(C)+P(E),XR(c)
      • P(b);::B(I)
      • Q(h);::S(H)
      • S(g);OGATE::R(C)+P(E),XS(g)
      • S(g);SBLOCK::S(H)
      • S(g);S_CUTQ(h)::QAB(B)
      • S(g);N_GUARD::QAR2(B)
HTML5 logo

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).