MESON Chess Problem Database

Problem Display
PID: 156940 (8/BK1QRp2/5P2/1B2r2p/1R1rk3/4p3/1q2N1P1/8 w - - 0 1)

Niestroj, Georg

Troll, 2015

8/BK1QRp2/5P2/1B2r2p/1R1rk3/4p3/1q2N1P1/8

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Rxd4#
    • 1...Qa3
      • 2.Rxd4#
    • 1...Qb1
      • 2.Rxd4#
    • 1...Qa2
      • 2.Rxd4#
    • 1...Qc2
      • 2.Rxd4#
    • 1...Qxe2
      • 2.Rxd4#
    • 1...Qb3
      • 2.Rxd4#
    • 1...Rxb4
      • 2.Qd3#
    • 1...Rc4
      • 2.Bc6#
  • Tries
    • 1.Qg4+?
      • 1...Kd5
        • 2.Rd7#
      • 1...hxg4!
    • 1.Qf5+?
      • 1...Kd5
        • 2.Rd7#
        • 2.Qxe5#
      • 1...Kxf5!
  • Keys
    • 1.Bb8!
      • threat
        • 2.Rxe5#
      • 1...Qxe2
        • 2.Rxd4#
      • 1...Rxb4
        • 2.Qd3#
      • 1...Rxe7
        • 2.Sg3#
      • 1...Re6
        • 2.Sg3#
      • 1...Rc4
        • 2.Bc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(a);N_GUARD::R1(C),XR(c)
    • Q(a);N_GUARD,XS(A)::R1(C),XR(c)
    • R(c);N_SPINR(c),OGATE,P_PINB(D),P_SPINR(e),XR(C)::QAB1(H)
    • R(c);::B(D)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • K(d);N_SPINR(c),S_FLIGHT::R(I)
      • Refutation
        • P(f);XQ(H)
    • Try
      • Q(H);CHECK
      • Refutation
        • K(d);N_SPINR(c),S_FLIGHT,XQ(H)
  • Actual
    • B(F);
    • Threat
      • R1(I),XR(e)
    • Vars
      • Q(a);N_GUARD,XS(A)::R1(C),XR(c)
      • R(c);N_SPINR(c),OGATE,P_PINB(D),P_SPINR(e),XR(C)::QAB1(H)
      • R(e);P_PINQ(H),XR(I)::S(A)
      • R(e);::S(A)
      • R(c);::B(D)
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