MESON Chess Problem Database

Problem Display
PID: 239153 (B4B1n/6r1/5p1N/3PkP2/6pN/3PP1K1/2n5/3Q4 w - - 0 1)

Groeneveld, Cornelis

Sachove umeni (Ceskoslovensky sach), 2001

B4B1n/6r1/5p1N/3PkP2/6pN/3PP1K1/2n5/3Q4

#2

10 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra7
      • 2.Sxg4#
    • 1...Rc7
      • 2.Sxg4#
    • 1...Rd7
      • 2.Sxg4#
    • 1...Rf7
      • 2.Sxg4#
    • 1...Rh7
      • 2.Sxg4#
    • 1...Sa1
      • 2.Qxa1#
    • 1...Se1
      • 2.Qa1#
    • 1...Sa3
      • 2.Qa1#
    • 1...Sxe3
      • 2.Qa1#
    • 1...Sb4
      • 2.Qa1#
    • 1...Sg6
      • 2.Sxg4#
  • Tries
    • 1.Qf3?
      • threat
        • 2.Qe4#
        • 2.Qf4#
      • 1...Re7
        • 2.Qf4#
      • 1...Rb7
        • 2.Sxg4#
        • 2.Qe4#
      • 1...Sg6
        • 2.Sxg4#
        • 2.Qe4#
      • 1...gxf3+!
    • 1.Qa1+?
      • 1...Sd4
        • 2.Qxd4#
        • 2.exd4#
      • 1...Sxa1!
    • 1.Qf1?
      • threat
        • 2.Qf4#
      • 1...Sg6
        • 2.Sxg4#
      • 1...Rb7!
    • 1.d4+?
      • 1...Sxd4
        • 2.Qxd4#
      • 1...Ke4!
  • Keys
    • 1.Qxg4!
      • threat
        • 2.Sf3#
      • 1...Rxg4+
        • 2.Sxg4#
      • 1...Rb7
        • 2.Qe4#
      • 1...Re7
        • 2.Qf4#
      • 1...Se1
        • 2.d4#
      • 1...Sd4
        • 2.exd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 10
  • Sets
    • R(e);N_GUARD::S(H),XP(b)
    • S(a);N_GUARD::QAB(A),XS(a)
    • S(a);N_GUARD::QAB(A)
    • S(a);N_GUARD,XP(C)::QAB(A)
    • S(f);S_CUTR(e)::S(H),XP(b)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(e);::QAB1(A)
      • Refutation
        • P(b);CHECK,XQ(A)
    • Try
      • Q(A);CHECK
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(f);S_CUTR(e)::S(H),XP(b)
      • Refutation
        • R(e);
    • Try
      • P(B);CHECK
      • Vars
        • S(a);OGATE,XP(B)::QAB1(A),XS(a)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(A);P_SPINQ(A),XP(b)
    • Threat
      • S(E)
    • Vars
      • R(e);CHECK,XQ(A)::S(H),XR(e)
      • R(e);N_PINQ(A)::QAR1(A)
      • R(e);N_PINQ(A)::QAB1(A)
      • S(a);N_GUARD::P(B)
      • S(a);OGATE::P(C),XS(a)
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