MESON Chess Problem Database

Problem Display
PID: 35990 (2r3q1/4p1p1/Nb3P2/p1pN2Q1/R2nk3/2KR1pP1/2P5/4rb2 w - - 0 1)

Lies, Heinz

Recomm., BCF 004. Ty., 1930-1931

2r3q1/4p1p1/Nb3P2/p1pN2Q1/R2nk3/2KR1pP1/2P5/4rb2

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd5
      • 2.Qf4#
    • 1...Ra1
      • 2.Re3#
    • 1...Rb1
      • 2.Re3#
    • 1...Rc1
      • 2.Re3#
    • 1...Rd1
      • 2.Re3#
    • 1...Re3
      • 2.Rxe3#
    • 1...Be2
      • 2.Re3#
    • 1...Bxd3
      • 2.cxd3#
    • 1...Bc7
      • 2.Sxc5#
  • Tries
    • 1.Kb2?
      • threat
        • 2.Sc3#
      • 1...Qxd5
        • 2.Qf4#
      • 1...Rb1+!
  • Keys
    • 1.Kc4!
      • threat
        • 2.Qf4#
      • 1...Qxd5+
        • 2.Qxd5#
      • 1...Bxd3+
        • 2.cxd3#
      • 1...Bc7
        • 2.Sxc5#
      • 1...Se2
        • 2.Re3#
      • 1...Se6
        • 2.Sc3#
      • 1...e5
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • Q(l);SBLOCK,XS(F)::QAR1(G)
    • R(a);N_GUARD::R1(C)
    • R(a);N_GUARD,P_PINP(A)::R1(C)
    • R(a);N_GUARD,P_PINR(C)::R1(C),XR(a)
    • B(b);S_CUTR(a)::R1(C)
    • B(b);OGATE,XR(C)::P(A),XB(b)
    • B(h);N_GUARD,S_CUTR(k)::S(H),XP(g)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • S(F)
      • Vars
        • Q(l);SBLOCK,XS(F)::QAR1(G)
      • Refutation
        • R(a);CHECK
  • Actual
    • K(B);N_PINS(d),P-FLIGHT,P_SPINR(C),P_SPINS(F)
    • Threat
      • QAR1(G)
    • Vars
      • Q(l);CHECK,OGATE,XS(F)::QAB1(G),XQ(l)
      • B(b);CHECK,OGATE,XR(C)::P(A),XB(b)
      • B(h);N_GUARD,S_CUTR(k)::S(H),XP(g)
      • S(d);N_PINR(C)::R1(C)
      • S(d);N_PINS(F)::S(F)
      • P(i);SBLOCK::QAR2(G)
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