MESON Chess Problem Database

Problem Display
PID: 75602 (4rR2/3p1qr1/2pPNnp1/n3pkP1/2Q3pP/6P1/K1PN4/BB6 w - - 0 1)

Gamage, Frederick

American Chess Problemist, 1949

4rR2/3p1qr1/2pPNnp1/n3pkP1/2Q3pP/6P1/K1PN4/BB6

#2

12 + 11

5397 Frederick Gamage (Prcic) 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Qg8
      • 2.Rxf6#
    • 1...Rxe6
      • 2.Qf1#
    • 1...Se4
      • 2.Sxg7#
    • 1...Sd5
      • 2.Sxg7#
    • 1...Sh7
      • 2.Sxg7#
    • 1...Sg8
      • 2.Sxg7#
    • 1...dxe6
      • 2.Qf1#
  • Tries
    • 1.Sf1?
      • threat
        • 2.Se3#
      • 1...Sd5
        • 2.Sxg7#
      • 1...Sxc4!
    • 1.Rxf7?
      • threat
        • 2.Sxg7#
        • 2.Rxf6#
      • 1...Rxe6
        • 2.Qf1#
        • 2.Qe4#
      • 1...dxe6
        • 2.Rxf6#
        • 2.Qf1#
        • 2.Qe4#
      • 1...Rh7
        • 2.Rxf6#
      • 1...Rgg8
        • 2.Rxf6#
      • 1...Rf8
        • 2.Sxg7#
      • 1...Reg8
        • 2.Rxf6#
      • 1...Rxf7!
    • 1.Qe4+?
      • 1...Kxe6
        • 2.Qxe5#
      • 1...Sxe4!
    • 1.Qf4+?
      • 1...Kxe6
        • 2.Qxe5#
      • 1...exf4!
    • 1.c3+?
      • 1...Se4
        • 2.Sxg7#
        • 2.Bxe4#
      • 1...e4!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qxe5#
      • 1...Qxe6+
        • 2.c4#
      • 1...Kxe6
        • 2.Qxe5#
      • 1...Rxe6
        • 2.Qf2#
      • 1...Sc4
        • 2.Sd4#
      • 1...Sd5
        • 2.Sxg7#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(i);OGATE,P_SPINS(f)::R1(L),XS(f)
    • R(k);SBLOCK,XS(K)::QAR(G)
    • S(f);P_SPINQ(i)::S(K),XR(j)
    • P(h);SBLOCK,XS(K)::QAR(G)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • S(f);P_SPINQ(i)::S(K),XR(j)
      • Refutation
        • S(b);XQ(G)
    • Try
      • R(L);P_PINS(f),XQ(i)
      • Threat
        • DUALS(2)
      • Vars
        • R(j);::R1(L),XS(f)
        • R(k);::S(K),XR(j)
        • R(k);::R1(L),XS(f)
      • Refutation
        • R(j);N_SPINS(f),XR(L)
    • Try
      • Q(G);CHECK,P_SPINS(K)
      • Vars
        • K(d);P_SPINP(c),S_FLIGHT,XS(K)::QAR1(G),XP(c)
      • Refutation
        • S(f);P_SPINQ(i),XQ(G)
    • Try
      • Q(G);CHECK,P_SPINS(K)
      • Vars
        • K(d);S_FLIGHT,XS(K)::QAR1(G),XP(c)
      • Refutation
        • P(c);XQ(G)
    • Try
      • P(D);CHECK
      • Refutation
        • P(c);P_SPINP(c)
  • Actual
    • Q(G);P_PINP(c),P_SPINS(K)
    • Threat
      • QAR1(G),XP(c)
    • Vars
      • Q(i);CHECK,P_SPINS(f),SBLOCK,XS(K)::B(B)+P(D)
      • K(d);N_SPINP(c),S_FLIGHT,XS(K)::QAR1(G),XP(c)
      • R(k);SBLOCK,XS(K)::QAR(G)
      • S(b);N_PINS(K)::S(K)
      • S(f);N_PINS(K),N_SPINP(c),P_SPINQ(i)::S(K),XR(j)
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).