MESON Chess Problem Database

Problem Display
PID: 78628 (8/2Brp3/8/R1p1pP2/R2Pk1Pp/5n1P/Q1PpN1Kn/3Nb2B w - - 0 1)

Nietvelt, Gustaaf Josephus

Revista de Sah, 1928

8/2Brp3/8/R1p1pP2/R2Pk1Pp/5n1P/Q1PpN1Kn/3Nb2B

#2

13 + 10

1401 Postsjakk 1966

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd4
      • 2.Kxh2#
    • 1...exd4
      • 2.Sec3#
  • Tries
    • 1.dxc5+?
      • 1...Sd4
        • 2.Kxh2#
      • 1...Rd4!
    • 1.d5+?
      • 1...Sd4
        • 2.Kxh2#
      • 1...c4!
  • Keys
    • 1.Qb1!
      • threat
        • 2.c4#
      • 1...Kd5
        • 2.Qb7#
      • 1...Rxd4
        • 2.Qb7#
      • 1...Sxd4
        • 2.Kxh2#
      • 1...cxd4
        • 2.c3#
      • 1...exd4
        • 2.Sec3#
      • 1...c4
        • 2.c3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(d);P_SPINS(d),XP(I)::B(B)+K(F),XS(c)
    • P(h);P_SPINP(h),XP(I)::S(E)
  • Tries
    • Try
      • P(I);CHECK,XP(g)
      • Vars
        • S(d);P_SPINS(d)::B(B)+K(F),XS(c)
      • Refutation
        • R(i);P_SPINR(i)
    • Try
      • P(I);CHECK
      • Vars
        • S(d);P_SPINS(d)::B(B)+K(F),XS(c)
      • Refutation
        • P(g);P_SPINP(g)
  • Actual
    • Q(C);
    • Threat
      • QAB(C)+P(D)
    • Vars
      • K(e);P_SPINP(g),S_FLIGHT::QAB(C)
      • R(i);N_GUARD,P_SPINR(i),XP(I)::QAB(C)
      • S(d);P_SPINS(d),XP(I)::B(B)+K(F),XS(c)
      • P(g);P_SPINP(g),XP(I)::QAB(C)+P(D)
      • P(h);P_SPINP(h),XP(I)::S(E)
      • P(g);::QAB(C)+P(D)
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