MESON Chess Problem Database

Problem Display
PID: 141089 (8/4K3/BNk1p3/1R1p4/7p/1n2Q3/3P1b1B/1r2q3 w - - 0 1)

van Woerden, Jan

Probleemblad, 1976

8/4K3/BNk1p3/1R1p4/7p/1n2Q3/3P1b1B/1r2q3

#2

7 + 8

5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd2
      • 2.Qxe6#
    • 1...Qc1
      • 2.Qxe6#
    • 1...Qd1
      • 2.Qxe6#
    • 1...Qf1
      • 2.Qxe6#
    • 1...Qg1
      • 2.Qxe6#
    • 1...Qh1
      • 2.Qxe6#
    • 1...Sd4
      • 2.Qc3#
  • Tries
    • 1.Sd7?
      • threat
        • 2.Sb8#
        • 2.Rb6#
      • 1...Qxe3
        • 2.Sb8#
      • 1...Bxe3
        • 2.Sb8#
      • 1...Sxd2
        • 2.Sb8#
        • 2.Rc5#
      • 1...Bg3
        • 2.Qb6#
      • 1...Sa1
        • 2.Sb8#
        • 2.Rc5#
      • 1...Sc1
        • 2.Sb8#
        • 2.Rc5#
      • 1...Sd4
        • 2.Sb8#
        • 2.Rc5#
        • 2.Qc3#
      • 1...Sa5
        • 2.Sb8#
        • 2.Rc5#
      • 1...Sc5
        • 2.Sb8#
        • 2.Rxc5#
      • 1...d4
        • 2.Sb8#
      • 1...e5!
  • Keys
    • 1.Sxd5!
      • threat
        • 2.Sb4#
      • 1...Qxd2
        • 2.Qxe6#
      • 1...Sxd2
        • 2.Rc5#
      • 1...exd5
        • 2.Rb6#
      • 1...Sc5
        • 2.Rxc5#
      • 1...Bg3
        • 2.Qb6#
      • 1...Sa1
        • 2.Rc5#
      • 1...Sc1
        • 2.Rc5#
      • 1...Sd4
        • 2.Qc3#
      • 1...Sa5
        • 2.Rc5#
      • 1...e5
        • 2.Qh6#

Anticipated by 176303(1969)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 5
  • Sets
    • Q(b);N_GUARD,XP(A)::QAR2(C),XP(h)
    • Q(b);N_GUARD::QAR2(C),XP(h)
    • S(d);N_GUARD,S_CUTB(c)::QAR(C)
  • Tries
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);XQ(C)::S(F)
        • B(c);XQ(C)::S(F)
        • B(c);N_GUARD::QAR1(C)
        • P(f);::S(F)
      • Refutation
        • P(h);
  • Actual
    • S(F);XP(f)
    • Threat
      • S(F)
    • Vars
      • Q(b);N_GUARD,XP(A)::QAR2(C),XP(h)
      • S(d);N_GUARD,XP(A)::R1(D)
      • P(h);P_PINQ(C),SBLOCK,XS(F)::R1(D)
      • S(d);N_GUARD::R1(D),XS(d)
      • B(c);N_GUARD::QAR1(C)
      • S(d);N_GUARD::R1(D)
      • S(d);N_GUARD,S_CUTB(c)::QAR(C)
      • P(h);OGATEB::QAR(C)
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