MESON Chess Problem Database

Problem Display
PID: 160959 (8/4n1p1/n3B1p1/1R4N1/1p1kP3/3p4/1K6/2Qb2b1 w - - 0 1)

Degener, Udo

Freie Presse, 1978

8/4n1p1/n3B1p1/1R4N1/1p1kP3/3p4/1K6/2Qb2b1

#2

6 + 9

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bc2
      • 2.Qxg1#
    • 1...Be2
      • 2.Qxg1#
    • 1...Bb3
      • 2.Qxg1#
    • 1...Bf3
      • 2.Qxg1#
    • 1...Ba4
      • 2.Qxg1#
    • 1...Bg4
      • 2.Qxg1#
    • 1...Bh5
      • 2.Qxg1#
    • 1...Be3
      • 2.Qc4#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sc7
      • 2.Qc5#
    • 1...Sb8
      • 2.Qc5#
    • 1...Sd5
      • 2.Rxd5#
    • 1...Sf5
      • 2.Rd5#
    • 1...Sc6
      • 2.Rd5#
    • 1...Sc8
      • 2.Rd5#
    • 1...Sg8
      • 2.Rd5#
    • 1...d2
      • 2.Qxd2#
  • Tries
    • 1.e5?
      • threat
        • 2.Qf4#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sd5
        • 2.Rxd5#
      • 1...d2
        • 2.Qxd2#
      • 1...Bf3
        • 2.Qxg1#
      • 1...Be3
        • 2.Qc4#
      • 1...Bh2!
  • Keys
    • 1.Qf4!
      • threat
        • 2.e5#
      • 1...Sd5
        • 2.exd5#
      • 1...d2
        • 2.Qxd2#
      • 1...Bf3
        • 2.Sxf3#
      • 1...Bh2
        • 2.Qf2#
      • 1...Be3
        • 2.Qe5#
      • 1...Sc5
        • 2.Rxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 1
    • REMOVED MATES = 12
  • Sets
    • B(a);OGATE::QAB(A),XB(b)
    • B(b);SBLOCK::QAR1(A)
    • S(f);N_GUARD::QAB1(A),XS(f)
    • S(f);N_GUARD::QAB1(A)
    • S(h);N_GUARD::R1(D),XS(h)
    • S(h);N_GUARD::R1(D)
    • P(c);OGATEB::QAR2(A),XP(c)
  • Tries
    • Try
      • P(C);
      • Threat
        • QAR2(A)
      • Vars
        • S(f);N_GUARD::QAB1(A),XS(f)
        • S(h);N_GUARD::R1(D),XS(h)
        • P(c);OGATEB::QAR2(A),XP(c)
        • B(a);OGATE::QAB(A),XB(b)
        • B(b);SBLOCK::QAR1(A)
      • Refutation
        • B(b);
  • Actual
    • Q(A);
    • Threat
      • QAR(A)+P(C)
    • Vars
      • S(h);OGATE::QAR(A)+P(C),XS(h)
      • P(c);OGATEB::QAR2(A),XP(c)
      • B(a);N_GUARD::S(E),XB(a)
      • B(b);N_GUARD::QAB(A)
      • B(b);SBLOCK::QAB1(A)
      • S(f);N_GUARD,SBLOCK::R(D),XP(d)
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