MESON Chess Problem Database

Problem Display
PID: 245714 (b7/5B1K/3n1p1N/1RP1kP1Q/r3Pp1R/B1P5/1N1P4/1q6 w - - 0 1)

Wirtanen, Erkki Aukusti

Skakbladet, 1965

b7/5B1K/3n1p1N/1RP1kP1Q/r3Pp1R/B1P5/1N1P4/1q6

#2

13 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Qe2#
    • 1...Qxe4
      • 2.Sg4#
    • 1...Rxe4
      • 2.Sg4#
    • 1...Bxe4
      • 2.Sg4#
    • 1...Sxe4
      • 2.Sg4#
    • 1...Sxf5
      • 2.Qxf5#
  • Tries
    • 1.Sd3+?
      • 1...Kxe4
        • 2.Qe2#
      • 1...Qxd3!
    • 1.d4+?
      • 1...Kxe4
        • 2.Qe2#
      • 1...Rxd4!
    • 1.cxd6+?
      • 1...Kxe4
        • 2.Qe2#
      • 1...Bd5!
    • 1.c6+?
      • 1...Kxe4
        • 2.Qe2#
      • 1...Sxb5!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Sg4#
      • 1...Qxe4
        • 2.Sd3#
      • 1...Rxe4
        • 2.d4#
      • 1...Bxe4
        • 2.cxd6#
      • 1...Sxe4
        • 2.c6#
      • 1...Qg1
        • 2.Sd3#
      • 1...f3
        • 2.Qh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • K(d);OGATEB,P-FLIGHT,P_SPINP(c),XP(E)::QAR2(J)
    • Q(a);P_PINP(I),SBLOCK,XP(E)::S(K)
    • R(b);SBLOCK,XP(E)::S(K)
    • B(g);P_PINP(I),SBLOCK,XP(E)::S(K)
    • S(e);SBLOCK,XP(E)::S(K)
    • S(e);OGATE,P_SPINS(e),XP(I)::QAR1(J),XS(e)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINP(c),XP(E)::QAR2(J)
      • Refutation
        • Q(a);XS(A)
    • Try
      • P(B);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINP(c),XP(E)::QAR2(J)
      • Refutation
        • R(b);XP(B)
    • Try
      • P(H);CHECK,XS(e)
      • Vars
        • K(d);P-FLIGHT,P_SPINP(c),XP(E)::QAR2(J)
      • Refutation
        • B(g);P_SPINB(g)
    • Try
      • P(H);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINP(c),XP(E)::QAR2(J)
      • Refutation
        • S(e);XR(G)
  • Actual
    • Q(J);
    • Threat
      • S(K)
    • Vars
      • Q(a);N_GUARD,P_PINP(I),P_SPINQ(a),XP(E)::S(A)
      • R(b);N_GUARD,P_SPINR(b),XP(E)::P(B)
      • B(g);N_GUARD,P_PINP(I),P_SPINB(g),XP(E)::R(G)+P(H),XS(e)
      • S(e);N_GUARD,P_SPINS(e),XP(E)::R(G)+P(H)
      • Q(a);N_GUARD::S(A)
      • P(c);OGATEB::QAB(J)
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