MESON Chess Problem Database

Problem Display
PID: 83780 (4Q3/6NK/5p2/2BP1R2/3pP2p/R1q1k2r/8/1Nbn1B2 w - - 0 1)

Ellerman, Arnoldo

2nd HM., Problemas, 1969

4Q3/6NK/5p2/2BP1R2/3pP2p/R1q1k2r/8/1Nbn1B2

#2

10 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3
      • 2.Rxd3#
  • Tries
    • 1.Qa4?
      • threat
        • 2.Qxd4#
      • 1...Kxe4
        • 2.Qe8#
      • 1...Bxa3!
    • 1.Qb5?
      • threat
        • 2.Qe2#
      • 1...Kxe4
        • 2.Qe8#
      • 1...Qd3
        • 2.Qxd3#
      • 1...Rh2!
    • 1.Qe5?
      • threat
        • 2.Bxd4#
        • 2.Qxd4#
        • 2.Qf4#
      • 1...Bxa3
        • 2.Qf4#
      • 1...Rf3
        • 2.Bxd4#
        • 2.Qxd4#
      • 1...fxe5!
    • 1.Qb8?
      • threat
        • 2.Qf4#
      • 1...Kxe4
        • 2.Qe8#
      • 1...Rf3!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Qe2#
      • 1...Kxe4
        • 2.Qe8#
      • 1...Rf3
        • 2.Qxf3#
      • 1...Rh2
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(c);OGATE::R1(C),XQ(c)
  • Tries
    • Try
      • Q(J);
      • Threat
        • QAB1(J),XP(f)
      • Vars
        • K(d);N_SPINQ(c),OGATEB,P-FLIGHT,XP(D)::QAR(J)
      • Refutation
        • B(a);N_SPINQ(c),XR(C)
    • Try
      • Q(J);
      • Threat
        • QAR1(J)
      • Vars
        • K(d);N_SPINP(f),N_SPINQ(c),OGATEB,P-FLIGHT,XP(D)::QAR(J)
        • Q(c);N_GUARD::QAR1(J),XQ(c)
      • Refutation
        • R(e);
    • Try
      • Q(J);
      • Threat
        • DUALS(3)
      • Vars
        • B(a);N_SPINQ(c),XR(C)::QAB1(J)
      • Refutation
        • P(h);XQ(J)
    • Try
      • Q(J);
      • Threat
        • QAB1(J)
      • Vars
        • K(d);N_SPINP(f),N_SPINQ(c),OGATEB,P-FLIGHT,XP(D)::QAR(J)
      • Refutation
        • R(e);
  • Actual
    • Q(J);
    • Threat
      • QAR1(J)
    • Vars
      • K(d);N_SPINP(f),N_SPINQ(c),OGATEB,P-FLIGHT,XP(D)::QAR(J)
      • R(e);N_GUARD::QAR1(J),XR(e)
      • R(e);N_GUARD::QAR1(J)
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