MESON Chess Problem Database

Problem Display
PID: 142151 (1b3K2/3p2RB/7n/3Q2p1/2N1pk2/4nN1P/2q1PPr1/8 w - - 0 1)

Roche, Jean

Die Schwalbe, 1974

1b3K2/3p2RB/7n/3Q2p1/2N1pk2/4nN1P/2q1PPr1/8

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Qxe4#
    • 1...Qb3
      • 2.Qxe4#
    • 1...Qa4
      • 2.Qxe4#
    • 1...Qc1
      • 2.Qxe4#
    • 1...Qa2
      • 2.Qxe4#
    • 1...Qb2
      • 2.Qxe4#
    • 1...Qd2
      • 2.Qxe4#
    • 1...Qxe2
      • 2.Qxe4#
    • 1...Qc3
      • 2.Qxe4#
    • 1...Rxf2
      • 2.Qxg5#
    • 1...Rh2
      • 2.Qxg5#
    • 1...Rg3
      • 2.fxe3#
    • 1...Be5
      • 2.Qxe5#
    • 1...Bd6+
      • 2.Qxd6#
    • 1...Ba7
      • 2.Qe5#
      • 2.Qd6#
    • 1...Seg4
      • 2.Qxg5#
    • 1...Shg4
      • 2.Qxg5#
    • 1...exf3
      • 2.Qxf3#
    • 1...g4
      • 2.Qg5#
  • Keys
    • 1.Sh4!
      • threat
        • 2.Sg6#
      • 1...Bd6+
        • 2.Qxd6#
      • 1...Qxe2
        • 2.Qxe4#
      • 1...Rxf2
        • 2.Qxg5#
      • 1...Sxd5
        • 2.Sxg2#
      • 1...gxh4
        • 2.fxe3#
      • 1...Be5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 14
  • Sets
    • Q(a);N_GUARD::QAR1(F),XP(d)
    • Q(a);N_GUARD,XP(A)::QAR1(F),XP(d)
    • R(b);N_GUARD,XP(B)::QAB1(F),XP(f)
    • R(b);N_GUARD::QAB1(F),XP(f)
    • R(b);SBLOCK::P(B),XS(c)
    • B(i);N_GUARD::QAB1(F),XB(i)
    • B(i);CHECK,N_GUARD::QAB(F),XB(i)
    • S(c);S_CUTR(b)::QAB1(F),XP(f)
    • S(g);S_CUTR(b)::QAB1(F),XP(f)
    • P(d);OGATE,XS(C)::QAR1(F),XP(d)
    • P(f);S_CUTR(b)::QAB1(F)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • B(i);CHECK,N_GUARD::QAB(F),XB(i)
      • Q(a);N_GUARD,XP(A)::QAR1(F),XP(d)
      • R(b);N_GUARD,XP(B)::QAB1(F),XP(f)
      • S(c);N_GUARD,XQ(F)::S(C),XR(b)
      • P(f);XS(C)::P(B),XS(c)
      • B(i);N_GUARD::QAB1(F),XB(i)
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