MESON Chess Problem Database

Problem Display
PID: 186658 (3nRbb1/4nNPB/Np4P1/7p/4k3/1K2p3/2P4B/3Q4 w - - 0 1)

Henry, S

Chess, 1960

3nRbb1/4nNPB/Np4P1/7p/4k3/1K2p3/2P4B/3Q4

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf7+
      • 2.gxf7#
    • 1...Bxh7
      • 2.Sd6#
    • 1...Se6
      • 2.Sd6#
    • 1...e2
      • 2.Qd3#
  • Tries
    • 1.Sb4?
      • threat
        • 2.Qd5#
      • 1...Bxf7+
        • 2.gxf7#
      • 1...e2
        • 2.Qd3#
      • 1...Se6
        • 2.Sd6#
      • 1...Kf5!
    • 1.Sc5+?
      • 1...Kf5
        • 2.Qf3#
      • 1...bxc5!
    • 1.Rxe7+?
      • 1...Kf5
        • 2.Qf3#
      • 1...Se6
        • 2.Sd6#
      • 1...Bxe7!
    • 1.Qf3+?
      • 1...Kd4
        • 2.Be5#
      • 1...Kxf3!
    • 1.Qg4+?
      • 1...Kd5
        • 2.Qc4#
      • 1...hxg4!
    • 1.Qh1+?
      • 1...Kd4
        • 2.Be5#
      • 1...Kf5!
  • Keys
    • 1.Sc7!
      • threat
        • 2.Qd5#
      • 1...Bxf7+
        • 2.gxf7#
      • 1...Kf5
        • 2.Qf3#
      • 1...e2
        • 2.Qd3#
      • 1...Se6
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • B(h);CHECK,OGATE,XS(G)::B(I)+P(F),XB(h)
    • B(h);N_PINS(G),XB(I)::S(G)
    • S(f);N_PINS(G),N_SPINS(e)::S(G)
    • P(a);::QAB1(A)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAB1(A)
      • Vars
        • B(h);CHECK,OGATE,XS(G)::B(I)+P(F),XB(h)
        • P(a);::QAB1(A)
        • S(f);N_PINS(G),N_SPINS(e)::S(G)
      • Refutation
        • K(b);N_SPINS(e),S_FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • K(b);N_SPINS(e),S_FLIGHT::QAR2(A)
      • Refutation
        • P(d);XS(E)
    • Try
      • R(J);CHECK,XS(e)
      • Vars
        • K(b);S_FLIGHT::QAR2(A)
        • S(f);N_PINS(G),P_SPINS(f)::S(G)
      • Refutation
        • B(g);XR(J)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);N_SPINS(e),P-FLIGHT::B(C)
      • Refutation
        • K(b);N_SPINS(e),S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);N_PINS(G),N_SPINS(e),OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • P(c);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);N_SPINS(e),P-FLIGHT::B(C)
      • Refutation
        • K(b);N_SPINS(e),S_FLIGHT
  • Actual
    • S(E);
    • Threat
      • QAB1(A)
    • Vars
      • B(h);CHECK,OGATE,XS(G)::B(I)+P(F),XB(h)
      • K(b);N_SPINS(e),S_FLIGHT::QAR2(A)
      • P(a);::QAB1(A)
      • S(f);N_PINS(G),N_SPINS(e)::S(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).