MESON Chess Problem Database

Problem Display
PID: 233586 (6K1/r7/8/8/1N6/1R6/5pQ1/kn1B3R w - - 0 1)

Witt, Andreas

Freie Presse, 2011

6K1/r7/8/8/1N6/1R6/5pQ1/kn1B3R

#2

6 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...f1Q
      • 2.Qb2#
    • 1...f1S
      • 2.Qb2#
    • 1...f1B
      • 2.Qb2#
    • 1...f1R
      • 2.Qb2#
  • Tries
    • 1.Bf3?
      • threat
        • 2.Rhxb1#
        • 2.Rbxb1#
      • 1...Rg7+
        • 2.Qxg7#
      • 1...f1Q
        • 2.Qb2#
      • 1...f1S
        • 2.Qb2#
      • 1...f1B
        • 2.Qb2#
      • 1...f1R
        • 2.Qb2#
      • 1...Ra8+!
    • 1.Bg4?
      • threat
        • 2.Rhxb1#
        • 2.Rbxb1#
      • 1...Ra8+
        • 2.Qxa8#
      • 1...f1Q
        • 2.Qb2#
      • 1...f1S
        • 2.Qb2#
      • 1...f1B
        • 2.Qb2#
      • 1...f1R
        • 2.Qb2#
      • 1...Rg7+!
    • 1.Qg7+?
      • 1...Sc3
        • 2.Qxc3#
      • 1...Rxg7+!
  • Keys
    • 1.Bh5!
      • threat
        • 2.Rhxb1#
        • 2.Rbxb1#
      • 1...Rg7+
        • 2.Qxg7#
      • 1...Ra8+
        • 2.Qxa8#
      • 1...f1Q
        • 2.Qb2#
      • 1...f1S
        • 2.Qb2#
      • 1...f1B
        • 2.Qb2#
      • 1...f1R
        • 2.Qb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATE::QAB1(C)
  • Tries
    • Try
      • B(A);P_PINS(b)
      • Threat
        • DUALS(2)
      • Vars
        • R(d);CHECK,N_GUARD::QAB(C),XR(d)
        • P(c);N_SPINS(b),OGATE::QAB1(C)
      • Refutation
        • R(d);CHECK
    • Try
      • B(A);P_PINS(b)
      • Threat
        • DUALS(2)
      • Vars
        • R(d);CHECK,OGATEB::QAB(C),XR(d)
        • P(c);N_SPINS(b),OGATE::QAB1(C)
      • Refutation
        • R(d);CHECK
    • Try
      • Q(C);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB(C),XS(b)
      • Refutation
        • R(d);CHECK,XQ(C)
  • Actual
    • B(A);P_PINS(b)
    • Threat
      • DUALS(2)
    • Vars
      • R(d);CHECK,N_GUARD::QAB(C),XR(d)
      • R(d);CHECK,OGATEB::QAB(C),XR(d)
      • P(c);N_SPINS(b),OGATE::QAB1(C)
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