MESON Chess Problem Database

Problem Display
PID: 274360 (8/3Q3B/3p4/B2b1n2/4R3/3k3r/1KNp2r1/n2R4 w - - 0 1)

Schmoll, Werner

Troll, 2023

(First published on Wed Aug 2 2023)

8/3Q3B/3p4/B2b1n2/4R3/3k3r/1KNp2r1/n2R4

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Qxf5#
    • 1...Re2
      • 2.Rd4#
    • 1...Bxe4
      • 2.Qb5#
    • 1...Sg3
      • 2.Se1#
      • 2.Sb4#
    • 1...Sh4
      • 2.Se1#
      • 2.Sb4#
    • 1...Sh6
      • 2.Se1#
      • 2.Sb4#
    • 1...Se7
      • 2.Se1#
      • 2.Sb4#
    • 1...Sg7
      • 2.Se1#
      • 2.Sb4#
  • Tries
    • 1.Rxd2+?
      • 1...Kxe4
        • 2.Qxf5#
      • 1...Rxd2!
    • 1.Qb5+?
      • 1...Bc4
        • 2.Qxc4#
      • 1...Kxe4!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Se1#
      • 1...Bxe4
        • 2.Qb5#
      • 1...Sxc2
        • 2.Qxc2#
      • 1...Re3
        • 2.Rxe3#
      • 1...Bc4
        • 2.Qxc4#
      • 1...Se3
        • 2.Rxe3#
      • 1...Rg1
        • 2.Rxd2#
      • 1...Re2
        • 2.Rd4#
      • 1...Rh1
        • 2.Re3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • K(d);N_SPINP(b),OGATEB,P_SPINS(g),S_FLIGHT,XR(D)::QAB1(F),XS(g)
    • R(c);SBLOCK::R1(D)
    • B(f);N_GUARD,SBLOCK,XR(D)::QAB(F)
  • Tries
    • Try
      • R(A);CHECK,XP(b)
      • Vars
        • K(d);P_SPINS(g),S_CUTR(c),S_FLIGHT,XR(D)::QAB1(F),XS(g)
      • Refutation
        • R(c);P_PINS(C),XR(A)
    • Try
      • Q(F);CHECK
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::QAB1(F),XB(f)
      • Refutation
        • K(d);N_SPINP(b),P_SPINS(g),S_FLIGHT,XR(D)
  • Actual
    • Q(F);
    • Threat
      • S(C)
    • Vars
      • B(f);N_GUARD,SBLOCK,XR(D)::QAB(F)
      • S(a);OGATE,XS(C)::QAB1(F),XS(a)
      • R(e);N_GUARD::R1(D),XR(e)
      • B(f);N_GUARD::QAB1(F),XB(f)
      • S(g);::B(G)+R(D),DCHECK,XS(g)
      • R(c);N_GUARD::R1(A),XP(b)
      • R(c);SBLOCK::R1(D)
      • R(e);N_GUARD::R1(D)
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