MESON Chess Problem Database

Problem Display
PID: 107713 (6q1/1n1N3Q/p1R2R2/3k4/KB6/1p6/4N2b/1b1r1Br1 w - - 0 1)

Becker, Georg Albert

BCF, 1952

6q1/1n1N3Q/p1R2R2/3k4/KB6/1p6/4N2b/1b1r1Br1

#2

8 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Sc3#
    • 1...Be5
      • 2.Sb6#
    • 1...Sa5
      • 2.Rc5#
    • 1...Sc5+
      • 2.Rxc5#
    • 1...Sd6
      • 2.Rc5#
    • 1...Sd8
      • 2.Rc5#
  • Tries
    • 1.Qf5+?
      • 1...Be5
        • 2.Sb6#
        • 2.Qxe5#
      • 1...Bxf5!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Sc3#
      • 1...Sc5+
        • 2.Rxc5#
      • 1...Kxc4
        • 2.Sb6#
      • 1...Rdxf1
        • 2.Rd4#
      • 1...Rgxf1
        • 2.Qxg8#
      • 1...Qg3
        • 2.Qf7#
      • 1...Rc1
        • 2.Rd4#
      • 1...Rd3
        • 2.Qe4#
      • 1...Rg3
        • 2.Sf4#
      • 1...Bd3
        • 2.Rd4#
      • 1...Be5
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 4
  • Sets
    • R(b);P_PINB(D),SBLOCK::S(B)
    • B(d);SBLOCK::S(G)
    • S(h);N_GUARD::R1(E)
    • S(h);CHECK,N_GUARD::R1(E),XS(h)
  • Tries
    • Try
      • Q(H);CHECK
      • Refutation
        • B(a);XQ(H)
  • Actual
    • R(E);
    • Threat
      • S(B)
    • Vars
      • S(h);CHECK,N_GUARD::R1(E),XS(h)
      • K(f);S_FLIGHT,XR(E)::S(G)
      • R(b);N_GUARD,XB(A)::R1(E)
      • R(c);N_GUARD,XB(A)::QAB(H),XQ(i)
      • Q(i);N_GUARD::QAB(H)
      • R(b);N_GUARD::R1(E)
      • R(b);S_CUTB(a)::QAB1(H)
      • R(c);S_CUTB(d)::S(B)
      • B(a);S_CUTR(b)::R1(E)
      • B(d);SBLOCK::S(G)
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