MESON Chess Problem Database

Problem Display
PID: 114301 (K5Q1/8/8/4p3/Rn1bk2N/1rPr1n1N/1p1Pq1p1/1B2RbB1 w - - 0 1)

Albarda, Johannes

3rd Prize, 04. Kwik-Toernooi, 1975

K5Q1/8/8/4p3/Rn1bk2N/1rPr1n1N/1p1Pq1p1/1B2RbB1

#2

10 + 11

102 Probleemblad 1975
6490 yacpdb 2009
15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Sd5
      • 2.Qh7#
      • 2.Qg6#
  • Tries
    • 1.Sf2+?
      • 1...Kf4
        • 2.Qg4#
      • 1...Bxf2!
    • 1.Rxe2+?
      • 1...Be3
        • 2.Rxe3#
      • 1...Bxe2!
    • 1.Ra5?
      • threat
        • 2.Qh7#
        • 2.Qg4#
        • 2.Qg6#
      • 1...Sxe1
        • 2.Qh7#
        • 2.Qg6#
      • 1...Sxh4
        • 2.Qg4#
      • 1...Be3
        • 2.Qh7#
        • 2.Qg6#
      • 1...Sh2
        • 2.Qh7#
        • 2.Qg6#
      • 1...Sg5
        • 2.Qg6#
      • 1...Sd5
        • 2.Qxd5#
        • 2.Qh7#
        • 2.Qg6#
      • 1...Bc5!
    • 1.c4?
      • threat
        • 2.Qh7#
        • 2.Qg4#
        • 2.Qg6#
      • 1...Bxg1
        • 2.Qg4#
      • 1...Sxe1
        • 2.Qh7#
        • 2.Qg6#
      • 1...Sxh4
        • 2.Qg4#
      • 1...Bf2
        • 2.Qg4#
      • 1...Sh2
        • 2.Qh7#
        • 2.Qg6#
      • 1...Sg5
        • 2.Qg6#
      • 1...Sd5
        • 2.Qxd5#
        • 2.Qh7#
        • 2.Qg6#
      • 1...Be3!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Qxf3#
      • 1...Sxe1
        • 2.Sg5#
      • 1...Sxg1
        • 2.Sg5#
      • 1...Sxd2
        • 2.Sg5#
      • 1...Sxh4
        • 2.Sg5#
      • 1...Be3
        • 2.Qb7#
      • 1...Sh2
        • 2.Sg5#
      • 1...Sg5
        • 2.Sxg5#
      • 1...Sc2
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(j);N_SPINQ(c),N_SPINR(f),P-FLIGHT::QAR1(J)
      • Refutation
        • B(i);P_SPINS(h),XS(F)
    • Try
      • R(B);CHECK,XQ(c)
      • Vars
        • B(i);N_GUARD,P_SPINB(i),P_SPINS(h)::R1(B),XB(i)
      • Refutation
        • B(a);XR(B)
    • Try
      • R(G);
      • Threat
        • DUALS(3)
      • Vars
        • S(g);XS(H)::QAR2(J)
        • S(g);::QAB(J)
      • Refutation
        • B(i);
    • Try
      • P(E);
      • Threat
        • DUALS(3)
      • Vars
        • B(i);XB(C)::QAR2(J)
        • S(g);XS(H)::QAR2(J)
        • B(i);::QAR2(J)
        • S(g);::QAB(J)
      • Refutation
        • B(i);N_SPINQ(c)
  • Actual
    • Q(J);
    • Threat
      • QAB1(J),XS(g)
    • Vars
      • S(g);N_GUARD,N_SPINQ(c),XR(B)::S(F)
      • S(g);N_GUARD,XB(C)::S(F)
      • S(g);N_GUARD,XP(D)::S(F)
      • S(g);N_GUARD,XS(H)::S(F)
      • B(i);N_SPINQ(c),P_SPINS(h)::QAB(J)
      • S(g);N_GUARD::S(F)
      • S(g);N_GUARD::S(F),XS(g)
      • S(h);N_SPINR(f),P_SPINB(i)::S(F)
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