MESON Chess Problem Database

Problem Display
PID: 175135 (3krb1R/3pN1p1/1K1N4/2PP4/Q7/8/8/8 w - - 0 1)

Nielsen, Vilhelm

320 Danske Skakopgaver, 1902

3krb1R/3pN1p1/1K1N4/2PP4/Q7/8/8/8

#2

7 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe7
      • 2.Qa8#
    • 1...Bxe7
      • 2.Rxe8#
      • 2.Qa8#
  • Tries
    • 1.Qe4?
      • threat
        • 2.Sb7#
        • 2.Sf7#
      • 1...Bxe7
        • 2.Rxe8#
      • 1...Rxe7!
    • 1.Qh4?
      • threat
        • 2.Sb7#
        • 2.Sf7#
        • 2.Sc6#
      • 1...Rxe7
        • 2.Rxf8#
      • 1...Bxe7
        • 2.Rxe8#
      • 1...g5!
  • Keys
    • 1.Rh7!
      • 1...Kxe7
        • 2.Qh4#
      • 1...Rxe7
        • 2.Qa8#
      • 1...Bxe7
        • 2.Qa8#
      • 1...g5
        • 2.Sb7#
        • 2.Qa8#
      • 1...g6
        • 2.Sb7#
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(d);P_SPINB(e),SBLOCK,XS(F)::QAR(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(e);OGATE,P_SPINR(d),XS(F)::R1(G),XR(d)
      • Refutation
        • R(d);P_SPINB(e),XS(F)
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • R(d);OGATEB,P_SPINB(e),P_SPINR(d),XS(F)::R(G),XB(e)
        • B(e);OGATE,P_SPINB(e),P_SPINR(d),XS(F)::R1(G),XR(d)
      • Refutation
        • P(b);
  • Actual
    • R(G);
    • Vars
      • K(c);OGATEB,P_SPINP(b),S_FLIGHT,XS(F)::QAB(A)
      • R(d);SBLOCK,XS(F)::QAR(A)
      • B(e);SBLOCK,XS(F)::QAR(A)
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