MESON Chess Problem Database

Problem Display
PID: 23018 (B5b1/3K4/1pRNp1P1/P1p1k1p1/7p/n4Q2/2Np1B1P/1nbrrR2 w - - 0 1)

Groeneveld, Cornelis

1st Prize, Apro-75 JT, 1982

B5b1/3K4/1pRNp1P1/P1p1k1p1/7p/n4Q2/2Np1B1P/1nbrrR2

#2

11 + 13

264 Magyar Sakkelet 1983
3752 FIDE Album (1980-1982) 1988

SOLUTION

  • SOUND
  • Sets
    • 1...Bf7
      • 2.Sxf7#
    • 1...Bh7
      • 2.Sf7#
    • 1...Sxc2
      • 2.Sc4#
    • 1...Sc4
      • 2.Sxc4#
    • 1...Sb5
      • 2.Sc4#
    • 1...h3
      • 2.Bg3#
    • 1...c4
      • 2.Bd4#
    • 1...bxa5
      • 2.Rxc5#
    • 1...b5
      • 2.Rxc5#
  • Tries
    • 1.Bxh4?
      • threat
        • 2.Bg3#
      • 1...gxh4
        • 2.Qh5#
      • 1...Re4
        • 2.Qxe4#
      • 1...Sxc2!
    • 1.Bxc5?
      • threat
        • 2.Bd4#
      • 1...Sxc2
        • 2.Sc4#
      • 1...bxc5
        • 2.Rxc5#
      • 1...Re4
        • 2.Qxe4#
      • 1...Sb5
        • 2.Sc4#
      • 1...Bb2!
    • 1.Qe4+?
      • 1...Kf6
        • 2.Se8#
        • 2.Bd4#
      • 1...Rxe4!
    • 1.Qg4?
      • threat
        • 2.Qxg5#
      • 1...Kd5
        • 2.Rxc5#
      • 1...Kf6!
    • 1.Qf6+?
      • 1...Kd5
        • 2.Rxc5#
        • 2.Rxb6#
        • 2.Rc7#
        • 2.Rc8#
      • 1...Kxf6!
    • 1.axb6?
      • threat
        • 2.Rxc5#
      • 1...c4
        • 2.Bd4#
        • 2.Rc5#
      • 1...Sc3!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Qxg5#
      • 1...Kf4
        • 2.Bg3#
      • 1...Kd5
        • 2.Rxc5#
      • 1...Kf6
        • 2.Bd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • B(m);N_GUARD::S(H),XB(m)
    • B(m);N_GUARD::S(H)
    • S(f);N_GUARD,XS(B)::S(H)
    • S(f);N_GUARD::S(H),XS(f)
    • S(f);N_GUARD::S(H)
    • P(g);N_GUARD::B(C)
    • P(h);N_GUARD::B(C)
    • P(k);N_GUARD,XP(F)::R(G),XP(h)
    • P(k);N_GUARD::R(G),XP(h)
  • Tries
    • Try
      • B(C);XP(g)
      • Threat
        • B(C)
      • Vars
        • P(j);OGATEB,XB(C)::QAR(E)
        • R(d);N_GUARD::QAR1(E),XR(d)
      • Refutation
        • S(f);XS(B)
    • Try
      • B(C);XP(h)
      • Threat
        • B(C)
      • Vars
        • S(f);N_GUARD,XS(B)::S(H)
        • P(k);OGATE,XB(C)::R(G),XP(k)
        • R(d);N_GUARD::QAR1(E),XR(d)
        • S(f);N_GUARD::S(H)
      • Refutation
        • B(b);
    • Try
      • Q(E);CHECK
      • Refutation
        • R(d);XQ(E)
    • Try
      • Q(E);
      • Threat
        • QAR2(E),XP(j)
      • Vars
        • K(i);P-FLIGHT::B(K)+R(G),DCHECK,XP(h)
      • Refutation
        • K(i);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(i);S_FLIGHT,XQ(E)
    • Try
      • P(F);XP(k)
      • Threat
        • R(G),XP(h)
      • Refutation
        • S(a);
  • Actual
    • Q(E);P_PINP(j)
    • Threat
      • QAR2(E),XP(j)
    • Vars
      • K(i);N_SPINP(j),S_FLIGHT::R(A)+B(C),DCHECK
      • K(i);P-FLIGHT::B(K)+R(G),DCHECK,XP(h)
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