MESON Chess Problem Database

Problem Display
PID: 17498 (2R1B2b/1N2P3/p3r3/K1N2r2/2k1nR2/2p3pq/8/1b1Q4 w - - 0 1)

Hassberg, Eric Manfred

2/3 Prize, Christian Science Monitor, 1947

2R1B2b/1N2P3/p3r3/K1N2r2/2k1nR2/2p3pq/8/1b1Q4

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc5+
      • 2.Rxc5#
    • 1...Rd5
      • 2.Qa4#
    • 1...Rff6
      • 2.Sxe6#
    • 1...Rf7
      • 2.Sxe6#
    • 1...Rf8
      • 2.Sxe6#
    • 1...Re5
      • 2.Sd6#
    • 1...Rd6
      • 2.Sxd6#
    • 1...Rxe7
      • 2.Sd6#
    • 1...Ba2
      • 2.Qd3#
    • 1...Bd3
      • 2.Qxd3#
    • 1...Bd4
      • 2.Qb3#
    • 1...c2
      • 2.Qd3#
  • Tries
    • 1.Rxe4+?
      • 1...Rxe4
        • 2.Sd6#
      • 1...Bd4
        • 2.Rxd4#
        • 2.Qb3#
        • 2.Qxd4#
      • 1...Bxe4!
  • Keys
    • 1.Bf7!
      • threat
        • 2.Sd6#
      • 1...Rxc5+
        • 2.Rxc5#
      • 1...Rxf4
        • 2.Sxe4#
      • 1...Rxf7
        • 2.Sxe6#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Bd4
        • 2.Qb3#
      • 1...c2
        • 2.Qd3#
      • 1...Rd5
        • 2.Qa4#
      • 1...Be5
        • 2.Bxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • R(g);CHECK,OGATE,P_SPINR(g),XS(D)::R1(G),XR(g)
    • R(g);SBLOCK::QAR2(A)
    • R(g);N_PINS(D)::R(G)+S(D),XR(i)
    • R(i);N_GUARD::S(E)
    • R(i);N_GUARD::S(E),XR(i)
    • R(i);N_GUARD,XP(F)::S(E)
    • B(a);N_GUARD::QAB1(A)
    • B(a);N_GUARD::QAB1(A),XB(a)
    • B(j);N_SPINS(f),SBLOCK::QAB1(A)
    • P(b);S_CUTB(a)::QAB1(A)
  • Tries
    • Try
      • R(B);CHECK,XS(f)
      • Vars
        • R(i);XR(B)::S(E)
      • Refutation
        • B(a);XR(B)
  • Actual
    • B(H);P_PINR(i)
    • Threat
      • S(E)
    • Vars
      • R(g);CHECK,N_SPINR(i),OGATE,P_SPINR(g),XS(D)::R1(G),XR(g)
      • R(g);N_PINS(D),N_SPINS(f),XR(B)::R(G)+S(D),XS(f)
      • R(g);N_PINS(D),N_SPINR(i),XB(H)::R(G)+S(D),XR(i)
      • B(a);N_GUARD::QAB1(A),XB(a)
      • B(j);N_SPINS(f),SBLOCK::QAB1(A)
      • P(b);S_CUTB(a)::QAB1(A)
      • R(g);N_SPINR(i),SBLOCK::QAR2(A)
      • B(j);N_PINS(D),S_CUTR(g)::B(H),XR(i)
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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).