MESON Chess Problem Database

Problem Display
PID: 248939 (8/8/bn2B1Q1/3pN2K/3B3p/1N3P1r/3pkp1p/1R2r2R w - - 0 1)

de Haas, Bastian Evert

Schakend Nederland, 1987

8/8/bn2B1Q1/3pN2K/3B3p/1N3P1r/3pkp1p/1R2r2R

#2

9 + 10

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bd3
      • 2.Qxd3#
    • 1...Bb7
      • 2.Qd3#
    • 1...Bc8
      • 2.Qd3#
    • 1...Sc4
      • 2.Qd3#
    • 1...d1S
      • 2.Qc2#
    • 1...f1S
      • 2.Qg2#
  • Tries
    • 1.Qc2?
      • threat
        • 2.Qxd2#
      • 1...Rd1
        • 2.Qxd1#
      • 1...Sc4
        • 2.Qd3#
      • 1...f1S!
    • 1.Qg2?
      • threat
        • 2.Qxf2#
      • 1...Rxf3
        • 2.Qxf3#
      • 1...Rf1
        • 2.Qxf1#
      • 1...d1S!
    • 1.Qg5?
      • threat
        • 2.Qxd2#
        • 2.Qe3#
      • 1...Rxf3
        • 2.Qxd2#
      • 1...d1Q
        • 2.Qe3#
      • 1...d1S
        • 2.Sc1#
        • 2.Qd2#
      • 1...d1B
        • 2.Sc1#
        • 2.Qd2#
        • 2.Qe3#
      • 1...d1R
        • 2.Qe3#
      • 1...f1S
        • 2.Qg2#
      • 1...Rd1
        • 2.Qe3#
      • 1...Sc4!
  • Keys
    • 1.Bxd5!
      • threat
        • 2.Qe4#
      • 1...Rxf3
        • 2.Bxf3#
      • 1...Sxd5
        • 2.Qxa6#
      • 1...d1S
        • 2.Qc2#
      • 1...f1S
        • 2.Qg2#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Sc4
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(i);N_GUARD::QAB1(I),XB(i)
    • B(i);N_GUARD::QAB1(I)
    • S(j);S_CUTB(i)::QAB1(I)
    • P(b);OGATEB::QAR2(I)
    • P(d);OGATEB::QAR2(I)
  • Tries
    • Try
      • Q(I);P_PINP(b)
      • Threat
        • QAR1(I),XP(b)
      • Vars
        • R(a);N_GUARD::QAB1(I),XR(a)
        • S(j);S_CUTB(i)::QAB1(I)
      • Refutation
        • P(d);
    • Try
      • Q(I);P_PINP(d)
      • Threat
        • QAR1(I),XP(d)
      • Vars
        • R(f);OGATE,XP(D)::QAB1(I),XR(f)
        • R(a);N_GUARD::QAB1(I),XR(a)
      • Refutation
        • P(b);
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • R(f);XP(D)::QAR1(I),XP(b)
        • P(b);::QAR1(I)
        • P(d);OGATEB::QAR2(I)
        • R(a);::QAR1(I)
      • Refutation
        • S(j);
  • Actual
    • B(H);XP(h)
    • Threat
      • QAR2(I)
    • Vars
      • R(f);OGATE,XP(D)::B(H),XR(f)
      • S(j);OGATE,XB(H)::QAB(I),XB(i)
      • P(b);OGATEB::QAR2(I)
      • P(d);OGATEB::QAR2(I)
      • B(i);N_GUARD::QAB1(I),XB(i)
      • S(j);S_CUTB(i)::QAB1(I)
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