MESON Chess Problem Database

Problem Display
PID: 239149 (2n2R2/7K/2Q5/1N1Pn1p1/4k1Pb/3rPN2/2r1P3/1BB5 w - - 0 1)

Groeneveld, Cornelis

Sachove umeni (Ceskoslovensky sach), 1987

2n2R2/7K/2Q5/1N1Pn1p1/4k1Pb/3rPN2/2r1P3/1BB5

#2

11 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Sc3#
    • 1...Rb2
      • 2.Sc3#
    • 1...Rxe2
      • 2.Sc3#
    • 1...Rcc3
      • 2.Sxc3#
    • 1...Rd1
      • 2.Sc3#
    • 1...Rdc3
      • 2.Sxc3#
    • 1...Rxe3
      • 2.Sd2#
    • 1...Rd4
      • 2.Sc3#
    • 1...Rxd5
      • 2.Sc3#
    • 1...Be1
      • 2.Sxg5#
    • 1...Bf2
      • 2.Sxg5#
    • 1...Bg3
      • 2.Sxg5#
    • 1...Sb6
      • 2.Sd6#
    • 1...Sd6
      • 2.Sxd6#
    • 1...Sa7
      • 2.Sd6#
    • 1...Se7
      • 2.Sd6#
  • Tries
    • 1.Bxc2?
      • threat
        • 2.Sc3#
      • 1...Be1
        • 2.Sxg5#
      • 1...Sxf3!
    • 1.Qe6?
      • threat
        • 2.Qxe5#
      • 1...Rxd5
        • 2.Sc3#
        • 2.Qf5#
      • 1...Bg3
        • 2.Sxg5#
      • 1...Rc7+!
    • 1.exd3+?
      • 1...Kxd3
        • 2.Qxc2#
      • 1...Sxd3!
  • Keys
    • 1.Re8!
      • threat
        • 2.Rxe5#
      • 1...Rxe2
        • 2.d6#
      • 1...Rxe3
        • 2.Qc4#
      • 1...Bg3
        • 2.Sxg5#
      • 1...Se7
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 12
  • Sets
    • R(a);N_GUARD,P_SPINR(b)::S(G)
    • R(a);N_GUARD,P_SPINR(b),XP(C)::S(G)
    • R(a);N_GUARD,P_SPINR(b)::S(G),XR(a)
    • R(b);N_GUARD,P_SPINR(a)::S(G)
    • R(b);N_GUARD,P_SPINR(a)::S(G),XR(b)
    • R(b);N_GUARD,P_SPINR(a),SBLOCK,XP(D)::S(E)
    • R(b);N_GUARD,P_SPINR(a),XP(H)::S(G)
    • B(d);N_GUARD::S(E),XP(f)
    • S(g);N_GUARD::S(G)
    • S(g);N_GUARD::S(G),XS(g)
  • Tries
    • Try
      • B(A);P_PINR(b),XR(a)
      • Threat
        • S(G)
      • Vars
        • B(d);N_GUARD::S(E),XP(f)
      • Refutation
        • S(e);XS(E)
    • Try
      • Q(I);P_PINS(e)
      • Threat
        • QAR1(I),XS(e)
      • Vars
        • B(d);N_GUARD::S(E),XP(f)
      • Refutation
        • R(a);CHECK,P_SPINR(b)
    • Try
      • P(C);CHECK,XR(b)
      • Vars
        • K(c);P_SPINR(a),S_FLIGHT,XP(C)::QAB1(I),XR(a)
      • Refutation
        • S(e);XP(C)
  • Actual
    • R(K);P_PINS(e)
    • Threat
      • R1(K),XS(e)
    • Vars
      • R(a);N_GUARD,P_SPINR(b),XP(C)::QAB(I)+P(H)
      • R(b);N_GUARD,P_SPINR(a),XP(D)::QAR2(I)
      • B(d);N_GUARD::S(E),XP(f)
      • S(g);N_GUARD,N_SPINS(e)::S(G)
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