MESON Chess Problem Database

Problem Display
PID: 170010 (3K1R2/4P3/5Np1/2Q3p1/R2bbk2/rB3p2/1p1q1P1P/2BrN3 w - - 0 1)

Nissim, Enrique

HM., Enroque!!, 1946

3K1R2/4P3/5Np1/2Q3p1/R2bbk2/rB3p2/1p1q1P1P/2BrN3

#2

11 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf2+
      • 2.Sd3#
    • 1...Bc3+
      • 2.Sd3#
    • 1...Bd3
      • 2.Sxd3#
    • 1...Bf5
      • 2.Qd6#
      • 2.Qc7#
    • 1...Bc6
      • 2.Sd3#
    • 1...Bb7
      • 2.Sd3#
    • 1...Ba8
      • 2.Sd3#
    • 1...g4
      • 2.Sh5#
  • Tries
    • 1.Sd5+?
      • 1...Ke5
        • 2.e8Q#
        • 2.e8R#
      • 1...Kg4!
    • 1.Bxd2+?
      • 1...Be3
        • 2.Sd3#
        • 2.Rxe4#
        • 2.fxe3#
      • 1...Rxd2!
    • 1.Qd6+?
      • 1...Kf5
        • 2.Be6#
      • 1...Be5!
  • Keys
    • 1.Be6!
      • threat
        • 2.Sh5#
      • 1...Bxf2+
        • 2.Sd7#
      • 1...Bc3+
        • 2.Sd3#
      • 1...Be3+
        • 2.Sd7#
      • 1...Bxc5+
        • 2.Sd7#
      • 1...Be5+
        • 2.Sd5#
      • 1...Bxf6+
        • 2.Qd6#
      • 1...Bd5
        • 2.Qd6#
        • 2.Qc7#
      • 1...Bb1
        • 2.Qd6#
        • 2.Qc7#
      • 1...Bc2
        • 2.Qd6#
        • 2.Qc7#
      • 1...Bd3
        • 2.Qd6#
        • 2.Qc7#
      • 1...Bf5
        • 2.Qd6#
        • 2.Qc7#
      • 1...Bc6
        • 2.Qd6#
      • 1...Bb7
        • 2.Qd6#
        • 2.Qc7#
      • 1...Ba8
        • 2.Qd6#
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • B(f);CHECK,P_SPINB(g),XP(C)::S(B)
    • B(f);CHECK,P_SPINB(g)::S(B)
    • B(g);N_GUARD,P_SPINB(f)::S(B),XB(g)
    • B(g);N_GUARD,P_SPINB(f)::S(B)
    • P(i);SBLOCK::R(K)+S(H),DCHECK
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(h);N_SPINQ(c),S_FLIGHT::P=Q
      • Refutation
        • K(h);N_SPINQ(c),P-FLIGHT
    • Try
      • B(A);CHECK,XQ(c)
      • Refutation
        • R(a);XB(A)
    • Try
      • Q(G);CHECK
      • Vars
        • K(h);N_SPINQ(c),P-FLIGHT::B(E)
      • Refutation
        • B(f);P_PINQ(G),P_SPINB(g)
  • Actual
    • B(E);
    • Threat
      • R(K)+S(H),DCHECK
    • Vars
      • B(f);CHECK,N_GUARD,P_SPINB(g),XP(C)::R(K)+S(H)
      • B(f);CHECK,P_SPINB(g),S_CUTR(d)::S(B)
      • B(f);CHECK,N_GUARD,N_SPINQ(c),P_SPINB(g)::R(K)+S(H)
      • B(f);CHECK,N_GUARD,P_SPINB(g),XQ(G)::R(K)+S(H)
      • B(f);CHECK,P_SPINB(g),SBLOCK::R(K)+S(H),DCHECK
      • B(f);CHECK,N_GUARD,P_PINP(I),P_SPINB(g),XS(H)::QAB(G)
      • B(g);P_SPINB(f)::QAB(G)
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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).