MESON Chess Problem Database

Problem Display
PID: 18106 (2NnB3/1p2p3/2N5/rknR4/p3P2r/P4p2/1P1B1P1q/1K1Qb3 w - - 0 1)

Visserman, Eeltje

Problem (Zagreb), 1953

2NnB3/1p2p3/2N5/rknR4/p3P2r/P4p2/1P1B1P1q/1K1Qb3

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Sxa5#
    • 1...Ka6
      • 2.Sb4#
    • 1...Bxd2
      • 2.Qf1#
    • 1...Bxf2
      • 2.Qf1#
  • Tries
    • 1.Sb4+?
      • 1...Kc4
        • 2.Sb6#
        • 2.Qc2#
      • 1...Sc6!
    • 1.Sd4+?
      • 1...Kc4
        • 2.Qc2#
      • 1...Ka6!
    • 1.S6a7+?
      • 1...Kc4
        • 2.Sb6#
        • 2.Qc2#
      • 1...Ka6!
    • 1.Sb8+?
      • 1...Kc4
        • 2.Sb6#
        • 2.Qc2#
      • 1...Sc6!
    • 1.Sxd8+?
      • 1...Kc4
        • 2.Sb6#
        • 2.Qc2#
      • 1...Ka6!
    • 1.Bxe1?
      • threat
        • 2.Qd3#
      • 1...Kc4
        • 2.Sxa5#
      • 1...Ka6
        • 2.Sb4#
      • 1...Rxe4!
    • 1.Bc3?
      • threat
        • 2.Qd3#
      • 1...Kc4
        • 2.Sxa5#
      • 1...Ka6
        • 2.Sb4#
      • 1...Bd2
        • 2.Qf1#
      • 1...Rxe4!
    • 1.Rxc5+?
      • 1...Ka6
        • 2.Sb4#
        • 2.Rxa5#
      • 1...Kxc5!
    • 1.Qc2?
      • threat
        • 2.Qd3#
      • 1...Ka6
        • 2.Sb4#
      • 1...Rxe4!
    • 1.Qb3+?
      • 1...Ka6
        • 2.Sb4#
        • 2.Qb6#
      • 1...axb3!
  • Keys
    • 1.Bf4!
      • threat
        • 2.Qd3#
      • 1...Kc4
        • 2.Se5#
      • 1...Ka6
        • 2.Sb8#
      • 1...Bd2
        • 2.Qf1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • K(g);N_SPINS(h),S_FLIGHT::S(I),XR(f)
    • K(g);N_SPINS(h),S_FLIGHT::S(I)
    • B(a);OGATE,XB(D)::QAB(B)
    • B(a);OGATE,XP(E)::QAB(B)
  • Tries
    • Try
      • S(I);CHECK
      • Refutation
        • S(k);
    • Try
      • S(I);CHECK
      • Vars
        • K(g);N_SPINS(h),S_FLIGHT::QAR2(B)
      • Refutation
        • K(g);N_SPINS(h),S_FLIGHT
    • Try
      • S(I);CHECK
      • Refutation
        • K(g);N_SPINS(h),S_FLIGHT
    • Try
      • S(I);CHECK
      • Refutation
        • S(k);
    • Try
      • S(I);CHECK,XS(k)
      • Refutation
        • K(g);N_SPINS(h),S_FLIGHT
    • Try
      • B(D);XB(a)
      • Threat
        • QAB(B)
      • Vars
        • K(g);N_SPINS(h),S_FLIGHT::S(I),XR(f)
        • K(g);N_SPINS(h),S_FLIGHT::S(I)
      • Refutation
        • R(e);XP(G)
    • Try
      • B(D);
      • Threat
        • QAB(B)
      • Vars
        • K(g);N_SPINS(h),S_FLIGHT::S(I),XR(f)
        • K(g);N_SPINS(h),S_FLIGHT::S(I)
        • B(a);OGATE::QAB(B)
      • Refutation
        • R(e);XP(G)
    • Try
      • R(H);CHECK,XS(h)
      • Refutation
        • K(g);P-FLIGHT,XR(H)
    • Try
      • Q(B);
      • Threat
        • QAB(B)
      • Vars
        • K(g);N_SPINS(h),S_FLIGHT::S(I)
      • Refutation
        • R(e);XP(G)
    • Try
      • Q(B);CHECK
      • Refutation
        • P(d);XQ(B)
  • Actual
    • B(D);
    • Threat
      • QAB(B)
    • Vars
      • K(g);N_SPINS(h),S_FLIGHT::S(I)
      • B(a);OGATE::QAB(B)
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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).