MESON Chess Problem Database

Problem Display
PID: 135413 (6K1/2N4B/4NP1p/4pP2/Rn2k1pr/R3B1P1/br1n2p1/2bQ3q w - - 0 1)

Hassberg, Eric Manfred

6th Comm., Olympic Ty., 1948

6K1/2N4B/4NP1p/4pP2/Rn2k1pr/R3B1P1/br1n2p1/2bQ3q

#2

11 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rh2
      • 2.Qxg4#
    • 1...Rh3
      • 2.Qxg4#
    • 1...Rh5
      • 2.Qxg4#
    • 1...Bb1
      • 2.Sc5#
    • 1...Bxe6+
      • 2.fxe6#
    • 1...Sf3
      • 2.Qd3#
    • 1...Sc4
      • 2.Sc5#
  • Tries
    • 1.Bg1?
      • threat
        • 2.Re3#
        • 2.Qe2#
        • 2.Qe1#
      • 1...Bxe6+
        • 2.fxe6#
      • 1...Rb3
        • 2.Sc5#
      • 1...Bb3
        • 2.Qe2#
      • 1...Bc4
        • 2.Re3#
      • 1...Sb1
        • 2.Qd3#
      • 1...Sf1
        • 2.Qd3#
      • 1...Sb3
        • 2.Qd5#
      • 1...Sf3
        • 2.Qd3#
      • 1...Sc4
        • 2.Sc5#
      • 1...Qxg1!
  • Keys
    • 1.Bf2!
      • threat
        • 2.Re3#
        • 2.Qe2#
      • 1...Bxe6+
        • 2.fxe6#
      • 1...Qxd1
        • 2.Re3#
      • 1...Rb3
        • 2.Sc5#
      • 1...Bb3
        • 2.Qe2#
      • 1...g1S
        • 2.Re3#
      • 1...Qe1
        • 2.Qxe1#
      • 1...Qf1
        • 2.Re3#
      • 1...Bc4
        • 2.Re3#
      • 1...Sb1
        • 2.Qd3#
      • 1...Sf1
        • 2.Qd3#
      • 1...Sb3
        • 2.Qd5#
      • 1...Sf3
        • 2.Qd3#
      • 1...Sc4
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 4
  • Sets
    • R(j);N_GUARD::QAR2(A),XP(i)
    • B(c);N_PINS(G)::S(G)
    • B(c);CHECK,OGATE,XS(G)::B(J)+P(F),XB(c)
    • S(e);OGATE,SBLOCK::QAB1(A)
    • S(e);N_PINS(G),N_SPINS(g)::S(G)
  • Tries
    • Try
      • B(C);
      • Threat
        • DUALS(3)
      • Vars
        • B(c);CHECK,OGATE,XS(G)::B(J)+P(F),XB(c)
        • R(d);N_PINS(G)::S(G)
        • B(c);::QAR2(A)
        • B(c);N_SPINS(g)::R1(B)
        • S(e);OGATE::QAB1(A)
        • S(e);N_PINS(G),OGATE::QAB1(A)
        • S(e);N_PINS(G),N_SPINS(g)::S(G)
      • Refutation
        • Q(b);XB(C)
  • Actual
    • B(C);
    • Threat
      • DUALS(2)
    • Vars
      • B(c);CHECK,OGATE,XS(G)::B(J)+P(F),XB(c)
      • Q(b);XQ(A)::R1(B)
      • R(d);N_PINS(G)::S(G)
      • B(c);::QAR2(A)
      • P(f);::R1(B)
      • Q(b);N_GUARD::QAR(A),XQ(b)
      • Q(b);::R1(B)
      • B(c);N_SPINS(g)::R1(B)
      • S(e);OGATE::QAB1(A)
      • S(e);N_PINS(G),OGATE::QAB1(A)
      • S(e);N_PINS(G),N_SPINS(g)::S(G)
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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).