MESON Chess Problem Database

Problem Display
PID: 24326 (3R1b2/5KP1/7B/1pp1p3/4k2N/3n1N2/3r4/1nQ5 w - - 0 1)

Groeneveld, Cornelis

Sp. HM., Rukhlis-50 TT, 1997-1998

3R1b2/5KP1/7B/1pp1p3/4k2N/3n1N2/3r4/1nQ5

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Sg5#
      • 2.Qe3#
    • 1...Ra2
      • 2.Sg5#
      • 2.Qe3#
    • 1...Rb2
      • 2.Sg5#
      • 2.Qe3#
    • 1...Rc2
      • 2.Sg5#
      • 2.Qe3#
    • 1...Re2
      • 2.Sg5#
    • 1...Rf2
      • 2.Qe3#
    • 1...Rg2
      • 2.Qe3#
    • 1...Rh2
      • 2.Sg5#
      • 2.Qe3#
    • 1...Sa3
      • 2.Sxd2#
    • 1...Sc3
      • 2.Sxd2#
    • 1...b4
      • 2.Qc4#
  • Tries
    • 1.Rd4+?
      • 1...cxd4
        • 2.Qc6#
      • 1...exd4!
    • 1.Qxd2?
      • threat
        • 2.Sg5#
        • 2.Qe3#
        • 2.Qe2#
        • 2.Qxd3#
      • 1...Sxd2
        • 2.Sxd2#
      • 1...Be7
        • 2.Qe3#
        • 2.Qe2#
        • 2.Qxd3#
      • 1...Sc3
        • 2.Sg5#
        • 2.Qe3#
        • 2.Qxd3#
      • 1...Sc1
        • 2.Sg5#
        • 2.Qe3#
        • 2.Qd5#
      • 1...Se1
        • 2.Sg5#
        • 2.Qxe1#
        • 2.Qe3#
        • 2.Qe2#
        • 2.Qd5#
      • 1...Sb2
        • 2.Sg5#
        • 2.Qe1#
        • 2.Qe3#
        • 2.Qe2#
        • 2.Qd5#
      • 1...Sf2
        • 2.Sg5#
        • 2.Qe1#
        • 2.Qe3#
        • 2.Qe2#
        • 2.Qd5#
      • 1...Sb4
        • 2.Sg5#
        • 2.Qe1#
        • 2.Qe3#
        • 2.Qe2#
      • 1...Sf4
        • 2.Sg5#
      • 1...c4
        • 2.Sg5#
        • 2.Qe3#
        • 2.Qe2#
      • 1...Bd6!
    • 1.Qe1+?
      • 1...Re2
        • 2.Qxe2#
      • 1...Sxe1!
    • 1.Qg1?
      • threat
        • 2.Qe3#
        • 2.Qg6#
      • 1...Re2
        • 2.Qg6#
      • 1...Rf2
        • 2.Qg6#
      • 1...Rg2
        • 2.Qe3#
      • 1...Sf2
        • 2.Qg6#
      • 1...Sf4
        • 2.Sg5#
      • 1...Bd6!
  • Keys
    • 1.Qa3!
      • threat
        • 2.Qa8#
      • 1...Sxa3
        • 2.Sxd2#
      • 1...Ra2
        • 2.Qxd3#
      • 1...Sc3
        • 2.Sxd2#
      • 1...Sc1
        • 2.Qe3#
      • 1...Se1
        • 2.Qe3#
      • 1...Sb2
        • 2.Qe3#
      • 1...Sf2
        • 2.Qe3#
      • 1...Sb4
        • 2.Qe3#
      • 1...Sf4
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 4
  • Sets
    • R(b);::S(B)
    • R(b);OGATE,P_PINS(B)::QAR1(A)
    • R(b);OGATE::QAR1(A)
    • S(a);N_GUARD::S(B),XR(b)
    • P(e);N_GUARD::QAR2(A)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • P(f);OGATE,XR(G)::QAB(A)
      • Refutation
        • P(g);XR(G)
    • Try
      • Q(A);XR(b)
      • Threat
        • DUALS(4)
      • Vars
        • S(a);XQ(A)::S(B),XS(a)
        • S(c);::S(B)
      • Refutation
        • B(h);
    • Try
      • Q(A);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAR2(A),XR(b)
      • Refutation
        • S(c);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);::QAB(A)
        • R(b);P_PINS(B)::QAB(A)
        • R(b);::QAR1(A)
        • S(c);::QAB(A)
        • S(c);SBLOCK::S(B)
      • Refutation
        • B(h);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • S(a);N_GUARD,XQ(A)::S(B),XR(b)
      • R(b);N_GUARD::QAB1(A),XS(c)
      • S(a);N_GUARD::S(B),XR(b)
      • S(c);OGATE::QAR1(A)
      • S(c);SBLOCK::S(B)
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