MESON Chess Problem Database

Problem Display
PID: 143520 (Bn2R2b/1r6/1pq5/2p1B1P1/1NRNkPP1/1P1b2K1/QprP4/8 w - - 0 1)

Huse, Hans Markus

American Chess Problemist, 1949

Bn2R2b/1r6/1pq5/2p1B1P1/1NRNkPP1/1P1b2K1/QprP4/8

#2

13 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qf6
      • 2.Bxf6#
    • 1...Qh6
      • 2.Bf6#
    • 1...Rg7
      • 2.Bxg7#
    • 1...Rh7
      • 2.Bg7#
    • 1...Bxe5
      • 2.Rxe5#
    • 1...cxd4
      • 2.Rxd4#
  • Tries
    • 1.Bf6+?
      • 1...Qe6
        • 2.Rxe6#
      • 1...Re7
        • 2.Rxe7#
      • 1...Qxe8!
    • 1.Bg7+?
      • 1...Qe6
        • 2.Rxe6#
      • 1...Re7
        • 2.Rxe7#
      • 1...Qxe8!
    • 1.Bxb8+?
      • 1...Qe6
        • 2.Bxb7#
      • 1...Re7
        • 2.Bxc6#
      • 1...Be5
        • 2.Rxe5#
      • 1...Qxe8!
    • 1.Bxh8+?
      • 1...Qe6
        • 2.Rxe6#
      • 1...Re7
        • 2.Rxe7#
      • 1...Qxe8!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Qh1#
      • 1...Rxd2
        • 2.Sf5#
      • 1...Qh6
        • 2.Bf6#
      • 1...Rc1
        • 2.Qxd3#
      • 1...Rh7
        • 2.Bg7#
      • 1...Bf1
        • 2.Se2#
      • 1...Be2
        • 2.Sxe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • Q(g);N_GUARD,P_SPINR(h)::R(M)+B(J),XQ(g)
    • Q(g);N_GUARD,P_SPINR(h)::R(M)+B(J)
    • R(h);N_GUARD,P_SPINQ(g)::R(M)+B(J),XR(h)
    • R(h);N_GUARD,P_SPINQ(g)::R(M)+B(J)
    • B(j);OGATE,P_PINP(H),P_SPINB(j),XB(J)::R1(M),XB(j)
    • P(e);OGATE,P_SPINP(e),XS(G)::R1(F),XP(e)
  • Tries
    • Try
      • B(J);CHECK
      • Vars
        • Q(g);N_GUARD,P_SPINQ(g),P_SPINR(h)::R(M),XQ(g)
        • R(h);N_GUARD,P_SPINQ(g),P_SPINR(h)::R(M),XR(h)
      • Refutation
        • Q(g);P_SPINR(h),XR(M)
    • Try
      • B(J);CHECK
      • Vars
        • Q(g);N_GUARD,P_SPINQ(g),P_SPINR(h)::R(M),XQ(g)
        • R(h);N_GUARD,P_SPINQ(g),P_SPINR(h)::R(M),XR(h)
      • Refutation
        • Q(g);P_SPINR(h),XR(M)
    • Try
      • B(J);CHECK,XS(i)
      • Vars
        • Q(g);P_SPINQ(g),P_SPINR(h),S_CUTB(j)::B(L),XR(h)
        • R(h);OGATE,P_SPINQ(g),P_SPINR(h)::B(L),XQ(g)
        • B(j);N_GUARD,P_PINP(H),P_SPINB(j)::R1(M),XB(j)
      • Refutation
        • Q(g);P_SPINR(h),XR(M)
    • Try
      • B(J);CHECK,XB(j)
      • Vars
        • Q(g);N_GUARD,P_SPINQ(g),P_SPINR(h)::R(M),XQ(g)
        • R(h);N_GUARD,P_SPINQ(g),P_SPINR(h)::R(M),XR(h)
      • Refutation
        • Q(g);P_SPINR(h),XR(M)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • R(b);N_GUARD,P_SPINB(c),XP(B)::R(F)+S(G)
      • Q(g);N_GUARD,P_SPINR(h)::R(M)+B(J)
      • R(b);OGATE,P_SPINB(c)::QAB1(A),XB(c)
      • R(h);N_GUARD,P_SPINQ(g)::R(M)+B(J)
      • B(c);N_GUARD,P_SPINR(b)::R(F)+S(G)
      • B(c);N_GUARD,P_SPINR(b)::R(F)+S(G),XB(c)
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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).