MESON Chess Problem Database

Problem Display
PID: 226644 (7n/q1PB4/3PRKp1/2bk1pN1/2r2P2/BQ6/3PN3/2rR4 w - - 0 1)

Barth, Michael

Freie Presse, 2010

7n/q1PB4/3PRKp1/2bk1pN1/2r2P2/BQ6/3PN3/2rR4

#2

12 + 8

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa3
      • 2.Qb7#
    • 1...Qa5
      • 2.Qb7#
    • 1...Qb7
      • 2.Qxb7#
    • 1...Bg1
      • 2.Re5#
    • 1...Bf2
      • 2.Re5#
    • 1...Be3
      • 2.Re5#
    • 1...Bb6
      • 2.Re5#
    • 1...Bxd6
      • 2.Rxd6#
  • Tries
    • 1.Ke7?
      • threat
        • 2.Re5#
      • 1...Bxd6+
        • 2.Rxd6#
      • 1...Bd4
        • 2.Qf3#
      • 1...Sf7!
    • 1.Qd3+?
      • 1...Bd4+
        • 2.Re5#
      • 1...Rd4!
  • Keys
    • 1.d4!
      • threat
        • 2.Qf3#
      • 1...Bxd4+
        • 2.Re5#
      • 1...Qxa3
        • 2.Qb7#
      • 1...Rc3
        • 2.Sxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • Q(g);N_GUARD,XB(D)::QAB(E)
    • Q(g);N_GUARD::QAB(E)
    • Q(g);N_GUARD::QAB(E),XQ(g)
    • B(c);::R1(I)
    • B(c);OGATE,XP(H)::R1(I),XB(c)
  • Tries
    • Try
      • K(J);P_SPINP(H),S_FLIGHT
      • Threat
        • R1(I)
      • Vars
        • B(c);CHECK,OGATE,XP(H)::R1(I),XB(c)
        • B(c);N_PINP(H)::QAB(E)
      • Refutation
        • S(h);
    • Try
      • Q(E);CHECK,N_PINR(b)
      • Vars
        • B(c);CHECK,P_SPINB(c)::R1(I)
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • P(B);
    • Threat
      • QAB(E)
    • Vars
      • B(c);CHECK,P_SPINB(c),XP(B)::R1(I)
      • Q(g);N_GUARD,XB(D)::QAB(E)
      • R(a);N_GUARD::S(C),XR(a)
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