MESON Chess Problem Database

Problem Display
PID: 234198 (1Nr5/Kp1Npp2/2p1kp2/7R/3p4/B1P1b3/2bQR3/4r3 w - - 0 1)

Ahues, Herbert Siegfried Oskar

1st Comm., Deutsche Schachzeitung, 1957

1Nr5/Kp1Npp2/2p1kp2/7R/3p4/B1P1b3/2bQR3/4r3

#2

8 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rc7
      • 2.Sf8#
    • 1...Rf8
      • 2.Sxf8#
    • 1...Bf5
      • 2.Qa2#
    • 1...Bg6
      • 2.Qa2#
    • 1...Bh7
      • 2.Qa2#
    • 1...dxc3+
      • 2.Sc5#
    • 1...d3+
      • 2.Qxe3#
  • Tries
    • 1.Rxe3+?
      • 1...Be4
        • 2.Qa2#
      • 1...dxe3
        • 2.Sc5#
      • 1...Rxe3!
    • 1.Qxe3+?
      • 1...Be4
        • 2.Qxe4#
      • 1...dxe3!
  • Keys
    • 1.Qxd4!
      • threat
        • 2.Sc5#
      • 1...c5
        • 2.Qd5#
      • 1...b6
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(k);N_GUARD::S(G)
    • R(k);N_GUARD::S(G),XR(k)
    • B(b);OGATE::QAB(A)
    • P(d);CHECK,XP(D)::S(G)
    • P(d);CHECK,N_GUARD,S_CUTB(b)::QAR(A),XB(c)
  • Tries
    • Try
      • R(B);CHECK,XB(c)
      • Vars
        • B(b);OGATE,P_SPINB(b)::QAB(A)
        • P(d);XR(B)::S(G)
      • Refutation
        • R(a);XR(B)
    • Try
      • Q(A);CHECK,XB(c)
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::QAR2(A),XB(b)
      • Refutation
        • P(d);P_SPINP(d),XQ(A)
  • Actual
    • Q(A);P_SPINQ(A),XP(d)
    • Threat
      • S(G)
    • Vars
      • P(e);N_PINQ(A)::QAB1(A)
      • P(h);N_PINQ(A)::QAB(A)
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