MESON Chess Problem Database

Problem Display
PID: 18224 (8/8/2K1p2N/2P1k1Pp/2Qp1n1R/8/4P3/8 w - - 0 1)

Groeneveld, Cornelis

6th Prize, L'Italia Scacchistica, 1954

8/8/2K1p2N/2P1k1Pp/2Qp1n1R/8/4P3/8

#2

7 + 5

3105 FIDE Album (1945-1955) 1964
3310 2345 Chess Problems 1997
5454 Near Snap 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qxe6#
    • 1...Sxe2
      • 2.Qxe2#
    • 1...Sg2
      • 2.Qxd4#
    • 1...Sd3
      • 2.Qxd4#
    • 1...Sh3
      • 2.Qxd4#
    • 1...Sd5
      • 2.Qxd4#
    • 1...Sg6
      • 2.Qxd4#
    • 1...d3
      • 2.Qxf4#
  • Tries
    • 1.Kd7?
      • 1...Ke4
        • 2.Qxe6#
      • 1...Sxe2
        • 2.Qxe6#
      • 1...Sg2
        • 2.Qxe6#
        • 2.Qxd4#
      • 1...Sd3
        • 2.Qxe6#
        • 2.Qxd4#
      • 1...Sh3
        • 2.Qxe6#
        • 2.Qxd4#
      • 1...Sd5
        • 2.Qxd4#
      • 1...Sg6
        • 2.Qxe6#
        • 2.Qxd4#
      • 1...d3!
    • 1.Sf7+?
      • 1...Ke4
        • 2.Qd3#
        • 2.Qxe6#
      • 1...Kf5!
    • 1.Rxf4?
      • threat
        • 2.Qxd4#
      • 1...d3
        • 2.Sf7#
        • 2.Re4#
        • 2.Qd4#
        • 2.Qe4#
      • 1...Kxf4!
    • 1.Qb4?
      • 1...Sxe2
        • 2.Qb8#
      • 1...d3
        • 2.Qxf4#
      • 1...Sg2
        • 2.Qxd4#
        • 2.Qb8#
      • 1...Sd3
        • 2.Qxd4#
        • 2.Qb8#
      • 1...Sh3
        • 2.Qxd4#
        • 2.Qb8#
      • 1...Sd5
        • 2.Qxd4#
      • 1...Sg6
        • 2.Qxd4#
        • 2.Qb8#
      • 1...Ke4!
  • Keys
    • 1.e4!
      • 1...Kxe4
        • 2.Qe2#
      • 1...dxe4 ep
        • 2.Qxf4#
      • 1...d3
        • 2.Sf7#
      • 1...Se2
        • 2.Sf7#
      • 1...Sg2
        • 2.Sf7#
      • 1...Sd3
        • 2.Sf7#
      • 1...Sh3
        • 2.Sf7#
      • 1...Sd5
        • 2.Sf7#
      • 1...Sg6
        • 2.Sf7#

This anticipates 142587(1990)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 8
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT,P_SPINP(a),P_SPINS(b)::QAR2(B),XP(e)
    • S(b);OGATE,XP(A)::QAR(B),XS(b)
    • S(b);::QAB1(B),XP(a)
    • P(a);OGATE::QAB1(B),XS(b)
  • Tries
    • Try
      • K(F);S_FLIGHT
      • Vars
        • K(c);P-FLIGHT,P_SPINP(a),P_SPINS(b)::QAR2(B),XP(e)
        • S(b);N_GUARD,XP(A)::QAR1(B),XP(e)
        • S(b);::QAB1(B),XP(a)
      • Refutation
        • P(a);
    • Try
      • S(G);CHECK
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • R(C);XS(b)
      • Threat
        • QAB1(B),XP(a)
      • Refutation
        • K(c);P_SPINP(a),S_FLIGHT,XR(C)
    • Try
      • Q(B);
      • Vars
        • S(b);XP(A)::QAB(B)
        • P(a);OGATE::QAB1(B),XS(b)
        • S(b);::QAB1(B),XP(a)
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(a),P_SPINS(b)
  • Actual
    • P(A);
    • Vars
      • K(c);OGATEB,P-FLIGHT,P_SPINP(a),P_SPINS(b),XP(A)::QAR2(B)
      • P(a);EP,OGATE,XP(A)::QAB1(B),XS(b)
      • P(a);::S(G)
      • S(b);::S(G)
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