MESON Chess Problem Database

Problem Display
PID: 11805 (6r1/2pB2b1/1p2N3/2Rp3R/2pPk1pP/1P1pNnP1/4PP2/5Q1K w - - 0 1)

Brummelman, Derk Hendrikus (AKA Bruma, DH)

Jaarboek, 1972

6r1/2pB2b1/1p2N3/2Rp3R/2pPk1pP/1P1pNnP1/4PP2/5Q1K

#2

13 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...dxe2
      • 2.Qb1#
    • 1...d2
      • 2.Qb1#
    • 1...cxb3
      • 2.exd3#
    • 1...c3
      • 2.exd3#
  • Tries
    • 1.Sxc4?
      • threat
        • 2.exd3#
      • 1...Sxd4
        • 2.Sd2#
        • 2.Sg5#
      • 1...Sxh4
        • 2.Sd2#
      • 1...dxe2
        • 2.Qxe2#
        • 2.Qb1#
      • 1...dxc4
        • 2.Bc6#
      • 1...Se1
        • 2.Sd2#
      • 1...Sg1
        • 2.Sd2#
      • 1...Sd2
        • 2.Sxd2#
      • 1...Sh2
        • 2.Sd2#
      • 1...Se5
        • 2.Sd2#
      • 1...d2
        • 2.Qb1#
      • 1...Sg5!
    • 1.Sxd5?
      • threat
        • 2.Sc3#
      • 1...dxe2
        • 2.Qxe2#
        • 2.Qb1#
      • 1...c3
        • 2.Sxc3#
        • 2.exd3#
      • 1...Bxd4!
    • 1.Bc6?
      • threat
        • 2.Bxd5#
      • 1...dxe2
        • 2.Qb1#
      • 1...Rd8!
    • 1.exf3+?
      • 1...Kxf3
        • 2.Sg5#
      • 1...gxf3!
  • Keys
    • 1.Rxc4!
      • threat
        • 2.exd3#
      • 1...Sxd4
        • 2.Qg2#
      • 1...Sxh4
        • 2.Sg5#
      • 1...dxe2
        • 2.Qb1#
      • 1...dxc4
        • 2.Bc6#
      • 1...Se1
        • 2.Sg5#
      • 1...Sg1
        • 2.Sg5#
      • 1...Sd2
        • 2.Sg5#
      • 1...Sh2
        • 2.Sg5#
      • 1...Se5
        • 2.Sg5#
      • 1...Sg5
        • 2.Sxg5#
      • 1...d2
        • 2.Qb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 2
  • Sets
    • P(a);OGATEB,XP(C)::QAB(A)
    • P(a);OGATEB::QAB(A)
    • P(c);N_GUARD,XP(E)::P(C),XP(a)
    • P(c);N_GUARD::P(C),XP(a)
  • Tries
    • Try
      • S(F);XP(c)
      • Threat
        • P(C),XP(a)
      • Vars
        • S(b);N_GUARD,XP(I)::S(F)
        • P(f);OGATEB,XS(F)::B(M)
        • S(b);N_GUARD::S(F)
        • S(b);N_GUARD::S(F),XS(b)
        • P(a);OGATEB::QAB(A)
      • Refutation
        • S(b);
    • Try
      • S(F);XP(f)
      • Threat
        • S(F)
      • Refutation
        • B(i);XP(H)
    • Try
      • B(M);P_PINP(f)
      • Threat
        • B(M),XP(f)
      • Vars
        • P(a);OGATEB,XP(C)::QAB(A)
      • Refutation
        • R(j);
    • Try
      • P(C);CHECK,XS(b)
      • Vars
        • K(d);S_FLIGHT,XP(C)::S(L)
      • Refutation
        • P(e);XP(C)
  • Actual
    • R(J);XP(c)
    • Threat
      • P(C),XP(a)
    • Vars
      • S(b);OGATEB,P_SPINS(b),XP(H)::QAB(A)
      • S(b);N_GUARD,XP(I)::S(L)
      • P(a);OGATEB,XP(C)::QAB(A)
      • P(f);OGATEB,XR(J)::B(M)
      • S(b);N_GUARD::S(L)
      • S(b);N_GUARD::S(L),XS(b)
      • P(a);OGATEB::QAB(A)
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