MESON Chess Problem Database

Problem Display
PID: 163500 (2r5/1p2pp2/3p1B2/1Kpk1nN1/2Rp2p1/1P2p3/N3Bn2/1Q6 w - - 0 1)

Ott, Thierry

Basler Zeitung, 1977

(First published on Sun Apr 24 1977)

2r5/1p2pp2/3p1B2/1Kpk1nN1/2Rp2p1/1P2p3/N3Bn2/1Q6

#2

8 + 12

15601 Albrecht-Leiss-Degener Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qe4#
    • 1...Sh1
      • 2.Qe4#
      • 2.Qxh1#
    • 1...Sd3
      • 2.Qh1#
    • 1...Sh3
      • 2.Qe4#
      • 2.Qh1#
    • 1...Se4
      • 2.Qxe4#
    • 1...d3
      • 2.Sc3#
    • 1...exf6
      • 2.Qxf5#
  • Tries
    • 1.Bf3+?
      • 1...Se4
        • 2.Bxe4#
        • 2.Qxe4#
      • 1...gxf3!
    • 1.Rc1?
      • threat
        • 2.Bc4#
      • 1...exf6
        • 2.Qxf5#
      • 1...d3
        • 2.Sc3#
      • 1...c4
        • 2.Sb4#
      • 1...Sd3!
    • 1.Rc2?
      • threat
        • 2.Bc4#
      • 1...Sd3
        • 2.Qh1#
      • 1...d3
        • 2.Sc3#
      • 1...c4
        • 2.Sb4#
      • 1...exf6!
    • 1.Rc3?
      • threat
        • 2.Bc4#
      • 1...exf6
        • 2.Qxf5#
      • 1...Sd3
        • 2.Qh1#
      • 1...c4
        • 2.Sb4#
      • 1...d3!
    • 1.Rb4?
      • threat
        • 2.Bc4#
      • 1...cxb4
        • 2.Sxb4#
      • 1...exf6
        • 2.Qxf5#
      • 1...Sd3
        • 2.Qh1#
      • 1...d3
        • 2.Sc3#
      • 1...c4!
    • 1.Rxd4+?
      • 1...cxd4
        • 2.Sb4#
      • 1...Sxd4+!
    • 1.Qd3?
      • threat
        • 2.Sc3#
      • 1...exf6
        • 2.Qxf5#
      • 1...Sd1
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sxd3!
    • 1.Qh1+?
      • 1...Se4
        • 2.Qxe4#
      • 1...Sxh1!
  • Keys
    • 1.Ra4!
      • threat
        • 2.Bc4#
      • 1...exf6
        • 2.Qxf5#
      • 1...Sd3
        • 2.Qh1#
      • 1...d3
        • 2.Sc3#
      • 1...c4
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD::QAB1(A)
    • S(a);N_GUARD::QAB(A)
    • S(a);N_GUARD::QAB1(A),XS(a)
    • P(c);N_GUARD::S(B)
    • P(j);N_GUARD,XB(H)::QAR2(A),XS(g)
  • Tries
    • Try
      • B(C);CHECK
      • Refutation
        • P(d);XB(C)
    • Try
      • R(E);
      • Threat
        • B(C)
      • Vars
        • P(j);N_GUARD,XB(H)::QAR2(A),XS(g)
        • P(c);N_GUARD::S(B)
        • P(e);N_GUARD::S(B)
      • Refutation
        • S(a);
    • Try
      • R(E);
      • Threat
        • B(C)
      • Vars
        • S(a);N_GUARD::QAB(A)
        • P(c);N_GUARD::S(B)
        • P(e);N_GUARD::S(B)
      • Refutation
        • P(j);XB(H)
    • Try
      • R(E);
      • Threat
        • B(C)
      • Vars
        • P(j);N_GUARD,XB(H)::QAR2(A),XS(g)
        • S(a);N_GUARD::QAB(A)
        • P(e);N_GUARD::S(B)
      • Refutation
        • P(c);
    • Try
      • R(E);
      • Threat
        • B(C)
      • Vars
        • P(e);XR(E)::S(B),XP(e)
        • P(j);N_GUARD,XB(H)::QAR2(A),XS(g)
        • S(a);N_GUARD::QAB(A)
        • P(c);N_GUARD::S(B)
      • Refutation
        • P(e);
    • Try
      • R(E);CHECK,XP(c)
      • Vars
        • P(e);XR(E)::S(B)
      • Refutation
        • S(g);CHECK,XR(E)
    • Try
      • Q(A);P_PINP(c)
      • Threat
        • S(B)
      • Vars
        • P(j);N_GUARD,XB(H)::QAR2(A),XS(g)
        • S(a);N_GUARD::QAB1(A)
        • S(a);N_GUARD::QAB1(A),XS(a)
      • Refutation
        • S(a);N_SPINP(c),XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(A),XS(a)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • R(E);
    • Threat
      • B(C)
    • Vars
      • P(j);N_GUARD,XB(H)::QAR2(A),XS(g)
      • S(a);N_GUARD::QAB(A)
      • P(c);N_GUARD::S(B)
      • P(e);N_GUARD::S(B)
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