MESON Chess Problem Database

Problem Display
PID: 195023 (8/5B1p/q1r2p2/4bk2/3n1P2/1p2P2K/2RNP3/1Q6 w - - 0 1)

Hansen, Lorenz

Pittsburgh Gazette-Times, 1918

8/5B1p/q1r2p2/4bk2/3n1P2/1p2P2K/2RNP3/1Q6

#2

8 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf4
      • 2.Rc5#
    • 1...Bd6
      • 2.Rc5#
    • 1...Bc7
      • 2.Rc5#
    • 1...Bb8
      • 2.Rc5#
    • 1...Sxe2
      • 2.Rc4#
    • 1...Sf3
      • 2.Rc4#
    • 1...Sb5
      • 2.Rc3#
      • 2.Rc4#
      • 2.Rc5#
      • 2.Rxc6#
    • 1...Se6
      • 2.Rc4#
  • Tries
    • 1.Rc3+?
      • 1...Qd3
        • 2.Qxd3#
      • 1...Sc2!
    • 1.Rc5+?
      • 1...Qd3
        • 2.Qxd3#
      • 1...Sc2!
    • 1.Rxc6+?
      • 1...Qd3
        • 2.Qxd3#
      • 1...Sc2!
  • Keys
    • 1.Sf1!
      • threat
        • 2.Sg3#
      • 1...Ke4
        • 2.Rc4#
      • 1...Bxf4
        • 2.Rc5#
      • 1...Sxe2
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • B(c);XP(G)::QAB(A)+R(B),DCHECK
    • B(c);::QAB(A)+R(B),DCHECK
    • S(b);N_GUARD,XP(D)::QAB(A)+R(B)
    • S(b);N_GUARD::QAB(A)+R(B)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • Q(e);N_GUARD,P_PINP(E),P_SPINQ(e)::QAB(A),XQ(e)
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • R(B);CHECK,P_PINB(c)
      • Vars
        • Q(e);N_GUARD,P_PINP(E),P_SPINQ(e)::QAB(A),XQ(e)
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • R(B);CHECK,XR(f)
      • Vars
        • Q(e);N_GUARD,P_PINP(E),P_SPINQ(e)::QAB(A),XQ(e)
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • K(d);S_FLIGHT::QAB(A)+R(B)
      • B(c);XP(G)::QAB(A)+R(B),DCHECK
      • S(b);N_GUARD,XP(D)::QAB(A)+R(B)
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