MESON Chess Problem Database

Problem Display
PID: 160877 (8/B7/5n1p/R1Qpp3/5k1K/1r2pNNp/2q5/3r1R2 w - - 0 1)

Albrecht, Hermann

Kunze, Otto

Social Chess Quarterly (The), 1936

8/B7/5n1p/R1Qpp3/5k1K/1r2pNNp/2q5/3r1R2

#2

7 + 10

15601 Albrecht-Leiss-Degener Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Se1#
    • 1...Qf5
      • 2.Se1#
    • 1...Qg6
      • 2.Se1#
    • 1...Qh7
      • 2.Se1#
    • 1...Qc1
      • 2.Se1#
    • 1...Qc3
      • 2.Se1#
    • 1...Qxc5
      • 2.Se1#
    • 1...Rd2
      • 2.Sxd2#
    • 1...Rdd3
      • 2.Sd2#
    • 1...Rd4
      • 2.Sd2#
    • 1...Rb1
      • 2.Qxe3#
    • 1...Rb2
      • 2.Qxe3#
    • 1...Rb4
      • 2.Qxe3#
    • 1...Rb5
      • 2.Qxe3#
    • 1...Rb7
      • 2.Qxe3#
    • 1...Rb8
      • 2.Qxe3#
    • 1...d4
      • 2.Qxe5#
    • 1...e4
      • 2.Qd6#
  • Tries
    • 1.Qd4+?
      • 1...Qe4
        • 2.Se1#
      • 1...Rxd4
        • 2.Sd2#
      • 1...Se4
        • 2.Qxe5#
      • 1...e4
        • 2.Qe5#
        • 2.Qxf6#
      • 1...exd4!
    • 1.Qf8?
      • threat
        • 2.Qxh6#
      • 1...Qf2
        • 2.Qxf6#
      • 1...Qf5
        • 2.Se1#
      • 1...Qg6
        • 2.Se1#
      • 1...Qh7
        • 2.Se1#
      • 1...h5
        • 2.Qh6#
      • 1...Rxf1!
    • 1.Qxc2?
      • threat
        • 2.Se1#
        • 2.Se2#
        • 2.Qf5#
      • 1...Rxf1
        • 2.Qf5#
      • 1...Re1
        • 2.Sxe1#
        • 2.Qf5#
      • 1...Rd2
        • 2.Sxd2#
        • 2.Qf5#
      • 1...Rdd3
        • 2.Se1#
        • 2.Sg1#
        • 2.Sd2#
        • 2.Sh2#
        • 2.Sd4#
        • 2.Sg5#
      • 1...Rbd3
        • 2.Se1#
      • 1...Sg4
        • 2.Se2#
        • 2.Sh5#
        • 2.Qf5#
      • 1...e2
        • 2.Sxe2#
        • 2.Qf5#
      • 1...e4
        • 2.Qc7#
      • 1...Se4!
  • Keys
    • 1.Ra4+!
      • 1...Qe4
        • 2.Se1#
      • 1...Qc4
        • 2.Se1#
      • 1...Rd4
        • 2.Sd2#
      • 1...Rb4
        • 2.Qxe3#
      • 1...Se4
        • 2.Qf8#
      • 1...d4
        • 2.Qxe5#
      • 1...e4
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 14
  • Sets
    • Q(b);N_GUARD::R(A)+S(B)
    • Q(b);N_GUARD,XQ(F)::R(A)+S(B)
    • R(a);N_GUARD::R(A)+S(B),XR(a)
    • R(a);N_GUARD::R(A)+S(B)
    • R(c);N_GUARD::QAB1(F),XP(d)
    • P(g);OGATE::QAB1(F),XP(h)
    • P(h);OGATEB::QAB(F)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • Q(b);P_SPINQ(b)::R(A)+S(B)
        • R(a);XQ(F)::R(A)+S(B)
        • S(i);P_SPINS(i)::QAB1(F),XP(h)
      • Refutation
        • P(h);XQ(F)
    • Try
      • Q(F);P_PINS(i)
      • Threat
        • QAB(F),XP(j)
      • Vars
        • Q(b);N_GUARD,P_PINS(C)::QAR2(F),XS(i)
        • Q(b);N_GUARD,N_SPINS(i)::R(A)+S(B)
        • Q(b);N_GUARD::R(A)+S(B)
        • P(j);::QAB(F)
      • Refutation
        • R(a);XR(A)
    • Try
      • Q(F);XQ(b)
      • Threat
        • DUALS(3)
      • Vars
        • R(a);XR(A)::QAR1(F)
        • R(c);::R(A)+S(B)
        • P(h);OGATEB::QAB(F)
      • Refutation
        • S(i);
  • Actual
    • R(E);CHECK
    • Vars
      • Q(b);P_SPINQ(b)::R(A)+S(B)
      • R(a);P_SPINR(a)::R(A)+S(B)
      • R(c);P_SPINR(c)::QAB1(F),XP(d)
      • S(i);P_SPINS(i),S_CUTP(g),S_CUTP(h),S_CUTQ(b),S_CUTQ(b),S_CUTR(a),S_CUTR(c)::QAR(F)
      • P(g);OGATE,P_SPINP(g)::QAB1(F),XP(h)
      • P(h);P_SPINP(h),S_CUTP(g),S_CUTQ(b),S_CUTQ(b),S_CUTR(a),S_CUTR(c),S_CUTS(i)::QAB(F)
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