MESON Chess Problem Database

Problem Display
PID: 194167 (Q2R3K/7N/6p1/4k1p1/1n4P1/2ppBp1n/1bq5/r3R3 w - - 0 1)

Erlin, Konrad (AKA Erlinger, Konrad)

Magyar Sakkvilag, 1917

Q2R3K/7N/6p1/4k1p1/1n4P1/2ppBp1n/1bq5/r3R3

#2

7 + 11

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Bc1#
    • 1...Qb3
      • 2.Bc1#
    • 1...Qa4
      • 2.Bc1#
    • 1...Qc1
      • 2.Bxc1#
    • 1...Ra2
      • 2.Bd2#
    • 1...Ra3
      • 2.Bd2#
    • 1...Ra4
      • 2.Bd2#
    • 1...Ra5
      • 2.Bd2#
    • 1...Ra6
      • 2.Bd2#
    • 1...Ra7
      • 2.Bd2#
    • 1...Rxa8
      • 2.Bd2#
    • 1...Bc1
      • 2.Bd2#
    • 1...Sf4
      • 2.Bd4#
    • 1...Sa2
      • 2.Qd5#
    • 1...Sd5
      • 2.Qxd5#
    • 1...Sa6
      • 2.Qd5#
  • Tries
    • 1.Qc6?
      • threat
        • 2.Re8#
        • 2.Qe8#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Qb3
        • 2.Bc1#
      • 1...Qa4
        • 2.Bc1#
        • 2.Re8#
      • 1...Ra6
        • 2.Bd2#
        • 2.Re8#
      • 1...Ra7
        • 2.Bd2#
      • 1...Ra8
        • 2.Bd2#
        • 2.Qe8#
      • 1...Sf4
        • 2.Bd4#
      • 1...Sxc6!
    • 1.Qa5+?
      • 1...Ke4
        • 2.Sf6#
        • 2.Rd4#
        • 2.Re8#
      • 1...Rxa5
        • 2.Bd2#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Ke6!
    • 1.Qb8+?
      • 1...Ke4
        • 2.Sf6#
        • 2.Rd4#
      • 1...Ke6!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qe8#
      • 1...Ke4
        • 2.Qe8#
      • 1...Ke6
        • 2.Qe8#
      • 1...Qxa4
        • 2.Bc1#
      • 1...Rxa4
        • 2.Bd2#
      • 1...Qb3
        • 2.Bc1#
      • 1...Sf4
        • 2.Bd4#
      • 1...Sd5
        • 2.Bf4#
      • 1...Sc6
        • 2.Bf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 11
  • Sets
    • Q(c);N_GUARD::R(A)+B(B)
    • Q(c);N_GUARD::R(A)+B(B),XQ(c)
    • R(a);N_GUARD::R(A)+B(B)
    • R(a);N_GUARD,P_PINR(F),XQ(E)::R(A)+B(B)
    • B(b);S_CUTR(a)::R(A)+B(B)
    • S(g);SBLOCK::R(A)+B(B),DCHECK
    • S(h);N_GUARD::QAR1(E)
    • S(h);N_GUARD::QAR1(E),XS(h)
  • Tries
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • S(h);N_GUARD::QAR1(E),XS(h)
        • Q(c);N_GUARD::R(A)+B(B)
        • R(a);N_GUARD::R(A)+B(B)
        • S(g);SBLOCK::R(A)+B(B),DCHECK
      • Refutation
        • S(h);XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • R(a);XQ(E)::R(A)+B(B)
        • S(h);N_GUARD,P_SPINS(h)::QAR1(E),XS(h)
      • Refutation
        • K(i);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(i);P-FLIGHT
  • Actual
    • Q(E);
    • Threat
      • QAR(E)
    • Vars
      • K(i);P-FLIGHT,P_SPINS(h)::QAR(E)
      • K(i);P-FLIGHT::QAR2(E)
      • Q(c);N_GUARD,XQ(E)::R(A)+B(B)
      • R(a);N_GUARD,XQ(E)::R(A)+B(B)
      • Q(c);N_GUARD::R(A)+B(B)
      • S(g);SBLOCK::R(A)+B(B),DCHECK
      • S(h);::R(A)+B(B),DCHECK
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