MESON Chess Problem Database

Problem Display
PID: 48726 (8/B1r1p3/8/2np2Q1/3pk2K/qnP3Rb/B2r4/1Nb5 w - - 0 1)

Volkmann, Albert

Schach-Express, 1949

8/B1r1p3/8/2np2Q1/3pk2K/qnP3Rb/B2r4/1Nb5

#2

7 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Bxd5#
    • 1...Sa5
      • 2.Bxd5#
    • 1...d3
      • 2.Re3#
  • Tries
    • 1.Sxd2+?
      • 1...Sxd2
        • 2.Bxd5#
      • 1...Bxd2!
    • 1.Qxd5+?
      • 1...Kf4
        • 2.Rf3#
      • 1...Kxd5!
  • Keys
    • 1.cxd4!
      • threat
        • 2.Qe5#
      • 1...Kxd4
        • 2.Qf4#
      • 1...Rxd4
        • 2.Sc3#
      • 1...Sxd4
        • 2.Bxd5#
      • 1...Bf5
        • 2.Qe3#
      • 1...Sd3
        • 2.Re3#
      • 1...Sd7
        • 2.Re3#
      • 1...e5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • S(d);OGATE::B(B),XP(i)
    • P(f);N_GUARD::R1(D)
  • Tries
    • Try
      • S(A);CHECK,XR(b)
      • Vars
        • S(d);OGATE,XS(A)::B(B),XP(i)
      • Refutation
        • B(a);XS(A)
    • Try
      • Q(F);CHECK,XP(i)
      • Vars
        • K(g);P-FLIGHT::R1(D)
      • Refutation
        • K(g);P_SPINS(d),S_FLIGHT,XQ(F)
  • Actual
    • P(C);XP(f)
    • Threat
      • QAR1(F)
    • Vars
      • K(g);P-FLIGHT,P_SPINS(h),XP(C)::QAR2(F)
      • R(b);SBLOCK,XP(C)::S(A)
      • S(d);OGATE,SBLOCK,XP(C)::B(B),XP(i)
      • B(e);SBLOCK::QAR1(F)
      • S(h);::R1(D)
      • P(k);::QAR1(F),XP(k)
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