MESON Chess Problem Database

Problem Display
PID: 234060 (3B2r1/3P1N1b/2P1k2N/8/2P1Pn2/1Q6/p2r1pp1/Kn2Rq2 w - - 0 1)

Wirtanen, Erkki Aukusti

Il Due Mosse, 1958

3B2r1/3P1N1b/2P1k2N/8/2P1Pn2/1Q6/p2r1pp1/Kn2Rq2

#2

10 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.exd5#
    • 1...Re8
      • 2.dxe8Q#
      • 2.dxe8R#
    • 1...Bxe4
      • 2.Rxe4#
    • 1...Bf5
      • 2.exf5#
    • 1...Sd3
      • 2.c5#
    • 1...Sd5
      • 2.exd5#
    • 1...Sg6
      • 2.Qh3#
  • Tries
    • 1.Qb5?
      • threat
        • 2.Qe5#
      • 1...Rd5
        • 2.exd5#
      • 1...Sd3
        • 2.Qd5#
      • 1...Sd5
        • 2.exd5#
      • 1...Sg6
        • 2.Qf5#
      • 1...Rg5!
    • 1.c5+?
      • 1...Rd5
        • 2.exd5#
      • 1...Sd5
        • 2.exd5#
      • 1...Qc4!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Qe5#
      • 1...Rd5
        • 2.exd5#
      • 1...Rd6
        • 2.Qxd6#
      • 1...Rg5
        • 2.Sxg5#
      • 1...Sd3
        • 2.Qd6#
      • 1...Sg6
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(d);OGATE::R(B)+P(E)DCHECK,XR(d)
    • R(j);OGATE::PXR(j)=Q
    • B(i);OGATE,P_SPINB(i),XP(E)::R(B),XB(i)
    • B(i);OGATE::R(B)+P(E)DCHECK,XB(i)
    • S(g);N_GUARD,S_CUTQ(b),S_CUTR(d)::QAB(C)+P(D)
    • S(g);OGATE::R(B)+P(E)DCHECK,XS(g)
    • S(g);N_GUARD,S_CUTB(i),S_CUTR(j)::QAB(C)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • R(d);OGATE::R(B)+P(E)DCHECK,XR(d)
        • S(g);N_GUARD,S_CUTR(d)::QAB1(C)
        • S(g);OGATE::R(B)+P(E)DCHECK,XS(g)
        • S(g);S_CUTB(i)::QAB1(C)
      • Refutation
        • R(j);
    • Try
      • P(D);CHECK
      • Vars
        • R(d);OGATE,P_SPINR(d)::R(B)+P(E)DCHECK,XR(d)
        • S(g);OGATE,P_SPINS(g)::R(B)+P(E)DCHECK,XS(g)
      • Refutation
        • Q(b);P_SPINQ(b)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • R(d);OGATE::R(B)+P(E)DCHECK,XR(d)
      • R(d);N_GUARD::QAR1(C),XR(d)
      • R(j);N_GUARD::S(I),XR(j)
      • S(g);S_CUTR(d)::QAR1(C)
      • S(g);S_CUTR(j)::S(I)
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