MESON Chess Problem Database

Problem Display
PID: 274684 (NR6/4K1p1/B7/1NkPp3/P1p1Q3/P1p4b/8/1r3nr1 w - - 0 1)

Hjelle, David

1st Comm., To Mat, 1964

NR6/4K1p1/B7/1NkPp3/P1p1Q3/P1p4b/8/1r3nr1

#2

9 + 9

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb5
      • 2.Rxb5#
    • 1...Rg4
      • 2.Rc8#
    • 1...Bg2
      • 2.Rc8#
    • 1...Bc8
      • 2.Rxc8#
  • Tries
    • 1.Sxc3?
      • threat
        • 2.Qxc4#
      • 1...Rb4
        • 2.axb4#
      • 1...Rb5
        • 2.Rxb5#
      • 1...Rg4
        • 2.Rc8#
      • 1...Sd2
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Rb7+!
    • 1.Sb6?
      • threat
        • 2.Qxc4#
      • 1...Rg4
        • 2.Sd7#
      • 1...Sd2
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Rb4!
    • 1.Qe3+?
      • 1...Kxd5
        • 2.Bb7#
      • 1...Sxe3!
    • 1.Qxe5?
      • threat
        • 2.Qd4#
        • 2.Qd6#
      • 1...Rxb5
        • 2.Rxb5#
      • 1...Rd1
        • 2.Qd6#
      • 1...Rg4
        • 2.Rc8#
        • 2.Qd6#
      • 1...Rg6
        • 2.Qd4#
      • 1...Re1!
  • Keys
    • 1.Sbc7!
      • threat
        • 2.Qxc4#
      • 1...Rb4
        • 2.axb4#
      • 1...Rb5
        • 2.Rxb5#
      • 1...Rg4
        • 2.Se6#
      • 1...Sd2
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(a);OGATE,XS(D)::R1(I),XR(a)
    • R(c);S_CUTB(e)::R(I)
    • B(e);N_GUARD::R(I)
    • B(e);N_GUARD::R(I),XB(e)
  • Tries
    • Try
      • S(D);XP(d)
      • Threat
        • QAR1(C),XP(f)
      • Vars
        • R(a);OGATE::P(A),XR(a)
        • R(a);N_GUARD::R1(I),XR(a)
        • R(c);S_CUTB(e)::R(I)
        • S(b);N_GUARD::QAB(C)
        • S(b);N_GUARD::QAB(C),XS(b)
      • Refutation
        • R(a);CHECK
    • Try
      • S(H);
      • Threat
        • QAR1(C),XP(f)
      • Vars
        • R(c);S_CUTB(e)::S(H)
        • S(b);N_GUARD::QAB(C)
        • S(b);N_GUARD::QAB(C),XS(b)
      • Refutation
        • R(a);
    • Try
      • Q(C);CHECK
      • Vars
        • K(g);P-FLIGHT,S_CUTS(b),XP(E)::B(F)
      • Refutation
        • S(b);XQ(C)
    • Try
      • Q(C);XP(h)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);OGATE,XS(D)::R1(I),XR(a)
        • R(a);::QAB1(C)
        • R(c);::QAB1(C)
      • Refutation
        • R(a);P_PINQ(C)
  • Actual
    • S(D);
    • Threat
      • QAR1(C),XP(f)
    • Vars
      • R(a);OGATE::P(A),XR(a)
      • R(a);N_GUARD::R1(I),XR(a)
      • R(c);S_CUTB(e)::S(D)
      • S(b);N_GUARD::QAB(C)
      • S(b);N_GUARD::QAB(C),XS(b)
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