MESON Chess Problem Database

Problem Display
PID: 157854 (8/8/8/2Br1b1Q/nKR1p3/3k4/3p1P1R/8 w - - 0 1)

Sag, Andy

Chess in Australia, 1990

8/8/8/2Br1b1Q/nKR1p3/3k4/3p1P1R/8

#2

6 + 6

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Rc3#
    • 1...Sc3
      • 2.Rxc3#
    • 1...Sb6
      • 2.Rc3#
    • 1...d1Q
      • 2.Qxd1#
    • 1...d1S
      • 2.Qxd1#
    • 1...d1B
      • 2.Qxd1#
    • 1...d1R
      • 2.Qxd1#
  • Tries
    • 1.Rh3+?
      • 1...e3
        • 2.Rxe3#
      • 1...Bxh3!
    • 1.Qf3+?
      • 1...e3
        • 2.Qxe3#
      • 1...exf3!
  • Keys
    • 1.f4!
      • threat
        • 2.Qe2#
      • 1...exf4 ep
        • 2.Qxf3#
      • 1...Sc3
        • 2.Rxc3#
      • 1...d1Q
        • 2.Qxd1#
      • 1...d1B
        • 2.Qxd1#
      • 1...Bg4
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • S(c);N_GUARD::R1(D)
    • S(c);N_GUARD::R1(D),XS(c)
    • P(a);OGATEB::QAR2(F),XQ(a)
    • P(a);OGATEB::QAR2(F),XS(a)
    • P(a);OGATEB::QAR2(F),XB(a)
    • P(a);OGATEB::QAR2(F),XR(a)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • P(d);P_SPINP(d)::R1(B),XP(d)
      • Refutation
        • B(f);XR(B)
    • Try
      • Q(F);CHECK
      • Vars
        • P(d);P_SPINP(d)::QAR1(F),XP(d)
      • Refutation
        • P(d);XQ(F)
  • Actual
    • P(A);
    • Threat
      • QAB1(F)
    • Vars
      • P(d);EP,N_GUARD,XP(A)::QAR2(F),XP(d)
      • S(c);N_GUARD::R1(D),XS(c)
      • P(a);OGATEB::QAR2(F),XQ(a)
      • P(a);OGATEB::QAR2(F),XB(a)
      • B(f);OGATE::QAR2(F),XR(e)
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