MESON Chess Problem Database

Problem Display
PID: 240186 (n3NB1K/r5p1/1p2kNP1/3p3R/1Q2p3/6bn/5p1r/8 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Tijdschrift vd KNSB, 1956

n3NB1K/r5p1/1p2kNP1/3p3R/1Q2p3/6bn/5p1r/8

#2

7 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qe7#
    • 1...Ra2
      • 2.Qe7#
    • 1...Ra3
      • 2.Qe7#
    • 1...Ra4
      • 2.Qe7#
    • 1...Ra5
      • 2.Qe7#
    • 1...Ra6
      • 2.Qe7#
    • 1...Re7
      • 2.Qxe7#
    • 1...Bh4
      • 2.Qd6#
    • 1...Bd6
      • 2.Qxd6#
    • 1...Bc7
      • 2.Qe7#
    • 1...Sf4
      • 2.Qd6#
    • 1...Sc7
      • 2.Qe7#
    • 1...e3
      • 2.Qg4#
    • 1...d4
      • 2.Qb3#
      • 2.Qc4#
  • Tries
    • 1.Qd4?
      • threat
        • 2.Qxd5#
      • 1...Ra5
        • 2.Sxg7#
      • 1...Sf4
        • 2.Qe5#
      • 1...Sc7
        • 2.Sxg7#
      • 1...Rd7!
    • 1.Qxe4+?
      • 1...Be5
        • 2.Rxe5#
        • 2.Qxd5#
        • 2.Qf5#
        • 2.Qg4#
        • 2.Qxe5#
      • 1...dxe4!
    • 1.Qxb6+?
      • 1...Bd6
        • 2.Qxd6#
      • 1...Sxb6!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qxd5#
      • 1...Rd7
        • 2.Qxd7#
      • 1...Ra5
        • 2.Qd7#
      • 1...Sf4
        • 2.Qc6#
      • 1...Sc7
        • 2.Qd7#
      • 1...d4
        • 2.Qc4#
        • 2.Qb3#
        • 2.Qd5#
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • R(i);N_GUARD::QAR1(A)
    • R(i);N_GUARD::QAR1(A),XR(i)
    • B(c);N_GUARD::QAR1(A)
    • B(c);N_GUARD::QAR1(A),XB(c)
    • B(c);S_CUTR(i)::QAR1(A)
    • S(d);P_PINR(B),S_CUTB(c)::QAR1(A)
    • S(k);S_CUTR(i)::QAR1(A)
    • P(e);OGATE::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XP(f)
      • Vars
        • R(i);N_GUARD::S(E),XP(j)
        • S(d);P_PINR(B),S_CUTB(c)::QAR1(A)
        • S(k);S_CUTR(i)::S(E),XP(j)
      • Refutation
        • R(i);
    • Try
      • Q(A);CHECK,XP(e)
      • Refutation
        • P(f);XQ(A)
    • Try
      • Q(A);CHECK,XP(g)
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAR1(A),XB(c)
      • Refutation
        • S(k);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A),XP(f)
    • Vars
      • R(i);N_GUARD::QAB1(A),XR(i)
      • R(i);N_GUARD::QAB1(A)
      • S(d);P_PINR(B),S_CUTB(c)::QAR2(A)
      • S(k);S_CUTR(i)::QAB1(A)
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