MESON Chess Problem Database

Problem Display
PID: 91073 (3K3B/N1Rn3Q/P3p3/1P2n3/1P1k4/2NP4/q3rP2/8 w - - 0 1)

Myllyniemi, Matti Arvo

Die Schwalbe, 1964

3K3B/N1Rn3Q/P3p3/1P2n3/1P1k4/2NP4/q3rP2/8

#2

11 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Rc4#
      • 2.Qxd7#
    • 1...Qc4
      • 2.Rxc4#
    • 1...Qd5
      • 2.Sxe2#
    • 1...Qa1
      • 2.Rc4#
      • 2.Qxd7#
    • 1...Qb2
      • 2.Rc4#
      • 2.Qxd7#
    • 1...Qc2
      • 2.Rc4#
      • 2.Qxd7#
    • 1...Qd2
      • 2.Rc4#
      • 2.Qxd7#
    • 1...Qa3
      • 2.Rc4#
      • 2.Qxd7#
    • 1...Qa4
      • 2.Rc4#
      • 2.Qxd7#
    • 1...Qa5
      • 2.Qxd7#
    • 1...Qxa6
      • 2.Rc4#
    • 1...Rb2
      • 2.Qe4#
    • 1...Rc2
      • 2.Qe4#
    • 1...Rd2
      • 2.Qe4#
    • 1...Rxf2
      • 2.Qe4#
    • 1...Re4
      • 2.Qxe4#
  • Tries
    • 1.Sxe2+?
      • 1...Qxe2
        • 2.Qxd7#
      • 1...Kd5!
    • 1.Rxd7+?
      • 1...Qd5
        • 2.Sxe2#
      • 1...Kxc3!
    • 1.Qh4+?
      • 1...Re4
        • 2.Qxe4#
      • 1...Kxd3!
  • Keys
    • 1.b6!
      • threat
        • 2.Sab5#
      • 1...Qxa6
        • 2.Qxd7#
      • 1...Rxf2
        • 2.Qe4#
      • 1...Qc4
        • 2.Rxc4#
      • 1...Re4
        • 2.Qxe4#
      • 1...Qd5
        • 2.Sxe2#
      • 1...Qa4
        • 2.Rc4#
      • 1...Qa5
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(a);N_GUARD::R1(H),XQ(a)
    • Q(a);N_GUARD,SBLOCK::S(B),XR(b)
    • Q(a);N_GUARD,P_PINR(H)::QAR(I),XS(f)
    • Q(a);N_GUARD,XP(F)::R1(H)
    • R(b);N_GUARD::QAR1(I)
    • R(b);N_GUARD,XP(A)::QAR1(I)
    • R(b);N_GUARD::QAR1(I),XR(b)
  • Tries
    • Try
      • S(B);CHECK,XR(b)
      • Vars
        • Q(a);XS(B)::QAR(I),XS(f)
      • Refutation
        • K(c);N_SPINS(d),P-FLIGHT
    • Try
      • R(H);CHECK,XS(f)
      • Vars
        • Q(a);P_PINR(H),P_SPINQ(a)::S(B),XR(b)
      • Refutation
        • K(c);S_FLIGHT,XS(B)
    • Try
      • Q(I);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAR1(I),XR(b)
      • Refutation
        • K(c);N_SPINS(d),P-FLIGHT,XP(C)
  • Actual
    • P(E);
    • Threat
      • S(G)
    • Vars
      • Q(a);N_GUARD,XP(F)::QAR(I),XS(f)
      • R(b);N_GUARD,XP(A)::QAR1(I)
      • Q(a);N_GUARD::R1(H),XQ(a)
      • R(b);N_GUARD::QAR1(I),XR(b)
      • Q(a);N_GUARD,SBLOCK::S(B),XR(b)
      • Q(a);N_GUARD::R1(H)
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