MESON Chess Problem Database

Problem Display
PID: 54628 (8/1bp3nN/4r1p1/RB3k2/3Rrp2/4P2P/2Q5/7K w - - 0 1)

Mansfield, Comins

Comm., Magyar Sakkelet, 1971

8/1bp3nN/4r1p1/RB3k2/3Rrp2/4P2P/2Q5/7K

#2

8 + 8

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Bc6#
    • 1...Ra6
      • 2.Bd7#
    • 1...Rb6
      • 2.Bd7#
    • 1...Rc6
      • 2.Qxe4#
    • 1...Rd6
      • 2.Bd7#
    • 1...Rf6
      • 2.Bd7#
    • 1...Re7
      • 2.Bd7#
    • 1...Re8
      • 2.Bd7#
  • Tries
    • 1.Bd7+?
      • 1...Bd5
        • 2.Rdxd5#
        • 2.Raxd5#
        • 2.Qxe4#
      • 1...c5!
    • 1.Qxe4+?
      • 1...Rxe4
        • 2.Bd7#
      • 1...Bxe4+!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Qg5#
      • 1...Ke5
        • 2.Bc6#
      • 1...Rxe3
        • 2.Bd3#
      • 1...Rxd4
        • 2.Bd3#
      • 1...Ra6
        • 2.Bd7#
      • 1...Rb6
        • 2.Bd7#
      • 1...Rc6
        • 2.Qxe4#
      • 1...Rd6
        • 2.Bd7#
      • 1...Rf6
        • 2.Bd7#
      • 1...Re7
        • 2.Bd7#
      • 1...Re8
        • 2.Bd7#
      • 1...g5
        • 2.Qxg5#
      • 1...R6e5
        • 2.Qg4#
      • 1...R4e5
        • 2.Rxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINR(a),P-FLIGHT::R(F)+B(G)
    • R(d);::R(F)+B(G),DCHECK
    • R(d);N_GUARD,S_CUTB(f)::QAB1(B),XR(a)
  • Tries
    • Try
      • B(G);CHECK
      • Refutation
        • P(g);P_SPINP(g)
    • Try
      • Q(B);CHECK,P_SPINQ(B),XR(a)
      • Vars
        • R(d);XQ(B)::R(F)+B(G),DCHECK
      • Refutation
        • B(f);CHECK,XQ(B)
  • Actual
    • Q(B);N_PINR(a)
    • Threat
      • QAR1(B)
    • Vars
      • K(c);P-FLIGHT::R(F)+B(G)
      • R(a);P_PINQ(B),XP(C)::R(F)+B(G),DCHECK
      • R(a);P_PINQ(B),XR(E)::R(F)+B(G),DCHECK
      • R(d);::R(F)+B(G),DCHECK
      • R(d);N_GUARD,S_CUTB(f)::QAB1(B),XR(a)
      • P(e);::QAR1(B),XP(e)
      • R(d);SBLOCK::QAB1(B)
      • R(a);OGATE,P_PINQ(B),SBLOCK::R1(E),XP(b)
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