MESON Chess Problem Database

Problem Display
PID: 211114 (3n4/qn4p1/2pR2P1/1rkN3K/1N3B2/Q2B4/rR6/4b3 w - - 0 1)

Vitense, Johannes

Deutsche Schachblatter, 1940

3n4/qn4p1/2pR2P1/1rkN3K/1N3B2/Q2B4/rR6/4b3

#2

9 + 9

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Sc2#
    • 1...Bf2
      • 2.Qc3#
    • 1...Bc3
      • 2.Qxc3#
    • 1...Bg3
      • 2.Qc3#
    • 1...Bh4
      • 2.Qc3#
    • 1...Sxd6
      • 2.Be3#
  • Tries
    • 1.Rc2+?
      • 1...Kd4
        • 2.Rc4#
      • 1...Bc3
        • 2.Qxc3#
      • 1...Rxc2!
    • 1.Rxc6+?
      • 1...Kd4
        • 2.Rc4#
      • 1...Sxc6!
    • 1.Qxa7+?
      • 1...Rb6
        • 2.Qxb6#
      • 1...Rxa7!
  • Keys
    • 1.Sb6!
      • threat
        • 2.Sd7#
      • 1...Kxb6+
        • 2.Sd5#
      • 1...Qxb6
        • 2.Sa6#
      • 1...Rxb6
        • 2.Sa6#
      • 1...Sxd6
        • 2.Be3#
      • 1...Sa5
        • 2.Sa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • K(d);P_PINS(F),S_FLIGHT::S(D)
    • B(a);N_GUARD::QAR2(B)
    • B(a);N_GUARD::QAR2(B),XB(a)
    • S(g);SBLOCK,XR(H)::B(E)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(d);P_PINS(F),S_FLIGHT::R1(A)
        • B(a);N_GUARD,P_SPINB(a)::QAR2(B),XB(a)
      • Refutation
        • R(b);XR(A)
    • Try
      • R(H);CHECK,XP(e)
      • Vars
        • K(d);OGATE,P_PINS(F),S_FLIGHT::R1(H)
      • Refutation
        • S(i);XR(H)
    • Try
      • Q(B);CHECK,XQ(f)
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAB1(B),XR(c)
      • Refutation
        • R(b);XQ(B)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(d);CHECK,P_SPINP(e),S_FLIGHT,XS(F)::S(D)
      • Q(f);SBLOCK,XS(F)::QAB(B)+S(D),DCHECK
      • R(c);XS(F)::QAB(B)+S(D),DCHECK
      • S(g);SBLOCK,XR(H)::B(E)
      • S(g);S_CUTQ(f)::S(F)
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