MESON Chess Problem Database

Problem Display
PID: 57435 (K2b4/3p1p1b/3BkP2/RN3n1N/2P1n3/2p1p2Q/B4r2/8 w - - 0 1)

Groeneveld, Cornelis

2nd Prize, Chess Life, 1955-1956

K2b4/3p1p1b/3BkP2/RN3n1N/2P1n3/2p1p2Q/B4r2/8

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.c5#
    • 1...Rf3
      • 2.c5#
    • 1...Rf4
      • 2.c5#
    • 1...Sxd6
      • 2.Sd4#
    • 1...Sxf6
      • 2.Sg7#
    • 1...c2
      • 2.c5#
    • 1...e2
      • 2.c5#
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qxe4#
      • 1...Rxf3
        • 2.c5#
      • 1...Bxf6
        • 2.Sf4#
      • 1...Sexd6
        • 2.Qd5#
      • 1...Sxf6
        • 2.Sf4#
      • 1...Sfxd6
        • 2.Sd4#
      • 1...Sd2
        • 2.Qd5#
      • 1...Seg3
        • 2.Qd5#
      • 1...Sc5
        • 2.Qd5#
      • 1...Sg5
        • 2.Qd5#
      • 1...Sfg3
        • 2.Sg7#
      • 1...Sd4
        • 2.Sg7#
      • 1...Sh4
        • 2.Sg7#
      • 1...Sh6
        • 2.Sg7#
      • 1...Se7
        • 2.Sg7#
      • 1...Sg7
        • 2.Sxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 12
    • REMOVED MATES = 4
  • Sets
    • R(a);N_GUARD::B(A)+P(C)
    • S(d);SBLOCK,XB(G)::S(E)
    • S(d);SBLOCK,XP(H)::S(F)
    • P(b);S_CUTR(a)::B(A)+P(C)
    • P(c);S_CUTR(a)::B(A)+P(C)
  • Actual
    • Q(B);N_PINS(e)
    • Threat
      • QAR2(B),XS(d)
    • Vars
      • R(a);N_GUARD,XQ(B)::B(A)+P(C)
      • B(j);SBLOCK,XP(H)::S(F)
      • S(d);OGATE,XB(G)::QAB1(B)
      • S(d);SBLOCK,XP(H)::S(F)
      • S(e);N_GUARD,SBLOCK,XB(G)::S(E)
      • S(d);OGATE::QAB1(B)
      • S(e);N_GUARD::S(F)
      • S(e);N_GUARD::S(F),XS(e)
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