MESON Chess Problem Database

Problem Display
PID: 24049 (8/8/8/8/8/B2p4/k7/rN1Q3K w - - 0 1)

Scheel, Johan

Social Demokraten, 1917

8/8/8/8/8/B2p4/k7/rN1Q3K

#2

4 + 3

3295 Einfuhrung in die Welt des Schachproblem 1984
5454 Near Snap 2008
3713 Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...d2
      • 2.Qc2#
  • Tries
    • 1.Kg1?
      • 1...d2
        • 2.Qc2#
      • 1...Rxb1!
    • 1.Kg2?
      • 1...d2
        • 2.Qc2#
      • 1...Rxb1!
    • 1.Kh2?
      • 1...d2
        • 2.Qc2#
      • 1...Rxb1!
    • 1.Bc1?
      • threat
        • 2.Sc3#
      • 1...Rxb1
        • 2.Qa4#
      • 1...Kxb1!
    • 1.Qd2+?
      • 1...Kxb1
        • 2.Qb2#
      • 1...Kb3!
  • Keys
    • 1.Qa4!
      • 1...Rxb1+
        • 2.Bc1#
      • 1...Kxb1
        • 2.Qb3#
      • 1...d2
        • 2.Qc2#

This anticipates 38405(1937), 231061(2006)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(c);N_GUARD::QAR2(B)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • P(c);N_GUARD::QAR2(B)
      • Refutation
        • R(a);P_PINQ(B),XS(A)
    • Try
      • K(C);S_FLIGHT
      • Vars
        • P(c);N_GUARD::QAR2(B)
      • Refutation
        • R(a);XS(A)
    • Try
      • K(C);P-FLIGHT
      • Vars
        • P(c);N_GUARD::QAR2(B)
      • Refutation
        • R(a);XS(A)
    • Try
      • B(D);
      • Threat
        • S(A)
      • Vars
        • R(a);SBLOCK,XS(A)::QAR2(B)
      • Refutation
        • K(b);S_FLIGHT,XS(A)
    • Try
      • Q(B);CHECK,P_SPINS(A)
      • Vars
        • K(b);S_FLIGHT,XS(A)::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(B);P_SPINS(A)
    • Vars
      • R(a);CHECK,SBLOCK,XS(A)::QAR(B)+B(D)
      • K(b);S_FLIGHT,XS(A)::QAR2(B)
      • P(c);N_GUARD::QAR2(B)
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