MESON Chess Problem Database

Problem Display
PID: 102485 (5K2/pQ2N3/4p2p/1B3b2/N2kPB2/1P3nRq/3b1P2/3R4 w - - 0 1)

Groeneveld, Cornelis

Le Courrier des Echecs, 1956

5K2/pQ2N3/4p2p/1B3b2/N2kPB2/1P3nRq/3b1P2/3R4

#2

11 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe4
      • 2.Qxa7#
    • 1...Sg1
      • 2.Rxd2#
    • 1...Sh2
      • 2.Rxd2#
    • 1...Sh4
      • 2.Rxd2#
    • 1...Se5
      • 2.Be3#
    • 1...Sg5
      • 2.Rxd2#
    • 1...e5
      • 2.Be3#
      • 2.Qd5#
  • Tries
    • 1.Sxf5+?
      • 1...exf5
        • 2.Qd5#
      • 1...Qxf5+!
    • 1.Be2?
      • threat
        • 2.Qb4#
      • 1...Se5
        • 2.Be3#
      • 1...a5!
    • 1.Ba6?
      • threat
        • 2.Qb4#
      • 1...Se5
        • 2.Be3#
      • 1...Qf1!
    • 1.Qc6?
      • threat
        • 2.Qc4#
      • 1...Se5
        • 2.Be3#
      • 1...Qf1!
  • Keys
    • 1.Bd3!
      • threat
        • 2.Qd7#
      • 1...Kxd3
        • 2.Rxd2#
      • 1...Bxf4
        • 2.Sc6#
      • 1...Bxe4
        • 2.Qxe4#
      • 1...Bb4
        • 2.Qxb4#
      • 1...Se5
        • 2.Qxa7#
      • 1...e5
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • B(e);SBLOCK,XP(F)::QAB(I),XP(h)
    • S(b);N_GUARD::R(A),XB(a)
    • S(b);SBLOCK::B(G)
  • Tries
    • Try
      • S(J);CHECK,XB(e)
      • Vars
        • P(f);XS(J)::QAR1(I)
      • Refutation
        • Q(c);CHECK,XS(J)
    • Try
      • B(H);
      • Threat
        • QAR2(I)
      • Vars
        • S(b);SBLOCK::B(G)
      • Refutation
        • P(h);
    • Try
      • B(H);
      • Threat
        • QAR2(I)
      • Vars
        • S(b);SBLOCK::B(G)
      • Refutation
        • Q(c);
    • Try
      • Q(I);
      • Threat
        • QAR1(I)
      • Vars
        • S(b);SBLOCK::B(G)
      • Refutation
        • Q(c);
  • Actual
    • B(H);N_PINB(a)
    • Threat
      • QAR(I)
    • Vars
      • K(d);OGATEB,P-FLIGHT,P_SPINB(a),P_SPINS(b),XB(H)::R1(A),XB(a)
      • B(a);XB(G)::S(J)
      • B(e);OGATE,XP(F)::QAR1(I),XB(e)
      • B(a);N_GUARD,P_PINS(J)::QAR2(I),XB(a)
      • S(b);::QAB(I),XP(h)
      • P(f);N_GUARD::QAR1(I)
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