MESON Chess Problem Database

Problem Display
PID: 264852 (B7/5pK1/qb2P3/2P2pRp/2QN1kbN/5pRn/3rppnr/2B5 w - - 0 1)

Gross, Erwin

The Problemist, 1993

B7/5pK1/qb2P3/2P2pRp/2QN1kbN/5pRn/3rppnr/2B5

#2

10 + 14

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Sc2#
    • 1...Kxg3
      • 2.Sdxf5#
    • 1...Ke5
      • 2.Sc6#
    • 1...Kxg5
      • 2.Sdxf3#
  • Tries
    • 1.Sc2+?
      • 1...Kxg3
        • 2.Sxf5#
      • 1...Ke5
        • 2.Qe4#
      • 1...Kxg5
        • 2.Sxf3#
      • 1...Qxc4!
    • 1.Sxe2+?
      • 1...Ke5
        • 2.Qe4#
      • 1...Kxg5
        • 2.Sxf3#
      • 1...Ke3!
    • 1.Sb3+?
      • 1...Ke3
        • 2.Bxd2#
        • 2.Qd4#
      • 1...Kxg3
        • 2.Sxf5#
      • 1...Ke5
        • 2.Qe4#
      • 1...Kxg5
        • 2.Sxf3#
      • 1...Qxc4!
    • 1.Sdxf3+?
      • 1...Ke3
        • 2.Bxd2#
        • 2.Qd4#
      • 1...Kxg3
        • 2.Sxf5#
      • 1...Qxc4!
    • 1.Sc6+?
      • 1...Ke3
        • 2.Qd4#
      • 1...Kxg3
        • 2.Sxf5#
      • 1...Kxg5
        • 2.Sxf3#
      • 1...Qxc4!
    • 1.Sg6+?
      • 1...Ke3
        • 2.Sc2#
      • 1...Kxg3
        • 2.Sxf5#
      • 1...Kxg5
        • 2.Sxf3#
      • 1...fxg6!
    • 1.Bxd2+?
      • 1...Kxg3
        • 2.Sdxf5#
        • 2.Shxf5#
      • 1...Ke5
        • 2.Sc6#
        • 2.Qd5#
      • 1...Se3!
  • Keys
    • 1.Sb5+!
      • 1...Ke3
        • 2.Qd4#
      • 1...Kxg3
        • 2.Sxf5#
      • 1...Ke5
        • 2.Qe4#
      • 1...Kxg5
        • 2.Sxf3#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 4
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(h);N_GUARD,P_SPINP(f),S_CUTQ(l),S_FLIGHT::S(D)
    • K(h);N_GUARD,N_SPINR(a),P_SPINB(i),S_CUTQ(l),S_FLIGHT,XR(B)::S(D),XP(j)
    • K(h);N_GUARD,N_SPINR(a),P_SPINP(j),S_CUTQ(l),S_FLIGHT::S(D)
    • K(h);N_GUARD,P_SPINB(i),S_CUTQ(l),S_FLIGHT,XR(G)::S(D),XP(f)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(h);N_GUARD,N_SPINR(a),P_SPINB(i),S_CUTQ(l),S_FLIGHT,XR(B)::S(E),XP(j)
        • K(h);N_GUARD,N_SPINR(a),P_SPINP(j),S_FLIGHT::QAR1(C)
        • K(h);N_GUARD,P_SPINB(i),S_CUTQ(l),S_FLIGHT,XR(G)::S(E),XP(f)
      • Refutation
        • Q(l);XQ(C)
    • Try
      • S(D);CHECK,XP(b)
      • Vars
        • K(h);N_GUARD,N_SPINR(a),P_SPINP(j),S_FLIGHT::QAR1(C)
        • K(h);N_GUARD,P_SPINB(i),S_FLIGHT,XR(G)::S(E),XP(f)
      • Refutation
        • K(h);P_SPINP(f),S_FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(h);N_GUARD,N_SPINR(a),P_SPINB(i),S_CUTQ(l),S_FLIGHT,XR(B)::S(E),XP(j)
        • K(h);N_GUARD,N_SPINR(a),P_SPINP(j),S_FLIGHT::QAR1(C)
        • K(h);N_GUARD,P_SPINB(i),S_CUTQ(l),S_FLIGHT,XR(G)::S(E),XP(f)
      • Refutation
        • Q(l);XQ(C)
    • Try
      • S(D);CHECK,XP(f)
      • Vars
        • K(h);N_SPINR(a),P_SPINB(i),S_CUTQ(l),S_FLIGHT,XR(B)::S(E),XP(j)
      • Refutation
        • Q(l);XQ(C)
    • Try
      • S(D);CHECK
      • Vars
        • K(h);N_GUARD,P_SPINP(f),S_FLIGHT::QAB1(C)
        • K(h);N_GUARD,N_SPINR(a),P_SPINB(i),S_CUTQ(l),S_FLIGHT,XR(B)::S(E),XP(j)
        • K(h);N_GUARD,P_SPINB(i),S_CUTQ(l),S_FLIGHT,XR(G)::S(E),XP(f)
      • Refutation
        • Q(l);XQ(C)
    • Try
      • S(E);CHECK
      • Vars
        • K(h);N_GUARD,P_SPINP(f),S_FLIGHT::S(D)
        • K(h);N_GUARD,N_SPINR(a),P_SPINB(i),S_FLIGHT,XR(B)::S(D),XP(j)
        • K(h);N_GUARD,P_SPINB(i),S_FLIGHT,XR(G)::S(D),XP(f)
      • Refutation
        • P(n);XS(E)
    • Try
      • B(A);CHECK,XR(a)
      • Refutation
        • S(d);P_SPINS(d)
  • Actual
    • S(D);CHECK
    • Vars
      • K(h);N_GUARD,P_SPINP(f),S_FLIGHT::QAB1(C)
      • K(h);N_GUARD,N_SPINR(a),P_SPINB(i),S_FLIGHT,XR(B)::S(E),XP(j)
      • K(h);N_GUARD,N_SPINR(a),P_SPINP(j),S_FLIGHT::QAR1(C)
      • K(h);N_GUARD,P_SPINB(i),S_FLIGHT,XR(G)::S(E),XP(f)
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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).