MESON Chess Problem Database

Problem Display
PID: 157483 (7R/7N/6K1/8/5pkp/R4n1r/6Pn/3Q4 w - - 0 1)

Godal, Ivar

Lud, 1964

7R/7N/6K1/8/5pkp/R4n1r/6Pn/3Q4

#2

6 + 6

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Rg3
      • 2.Sf6#
      • 2.Qd7#
  • Tries
    • 1.Qg1?
      • threat
        • 2.gxf3#
      • 1...Kg3
        • 2.gxf3#
      • 1...Sxg1
        • 2.Sf6#
      • 1...Rg3
        • 2.Sf6#
      • 1...Se1
        • 2.Sf6#
        • 2.gxh3#
      • 1...Sd2
        • 2.Sf6#
        • 2.gxh3#
      • 1...Sd4
        • 2.Sf6#
        • 2.gxh3#
      • 1...Sg5
        • 2.Sf6#
        • 2.gxh3#
      • 1...Se5+!
  • Keys
    • 1.g3!
      • 1...Kxg3
        • 2.Qg1#
      • 1...Rxg3
        • 2.Qd7#
      • 1...fxg3
        • 2.Ra4#
      • 1...hxg3
        • 2.Sf6#
      • 1...Sf1
        • 2.Qxf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);N_PINS(b)
      • Threat
        • QAR(A)+P(B)DCHECK,XS(b)
      • Vars
        • K(e);P-FLIGHT,P_SPINS(b)::QAR(A)+P(B),XS(b)
        • S(b);XQ(A)::S(E)
        • R(c);SBLOCK::S(E)
      • Refutation
        • S(b);CHECK
  • Actual
    • P(B);
    • Vars
      • K(e);OGATEB,P-FLIGHT,XP(B)::QAR2(A)
      • R(c);SBLOCK,XP(B)::QAB(A)
      • P(d);OGATEB,SBLOCK,XP(B)::R(C)
      • P(f);SBLOCK,XP(B)::S(E)
      • S(a);N_GUARD::QAB1(A),XS(b)
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