MESON Chess Problem Database

Problem Display
PID: 179079 (4N3/8/6p1/Nprk4/3B2BR/3Q4/2nK1p1p/5b1q w - - 0 1)

Wirtanen, Erkki Aukusti

Magasinet, 1936

4N3/8/6p1/Nprk4/3B2BR/3Q4/2nK1p1p/5b1q

#2

7 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Ba1+?
      • 1...Sd4
        • 2.Qxd4#
      • 1...Bxd3!
    • 1.Bb2+?
      • 1...Sd4
        • 2.Qxd4#
      • 1...Bxd3!
    • 1.Bxf2+?
      • 1...Ke5
        • 2.Bg3#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Bxd3!
    • 1.Bc3+?
      • 1...Sd4
        • 2.Qxd4#
      • 1...Bxd3!
    • 1.Bxc5+?
      • 1...Kxc5
        • 2.Qd6#
      • 1...Ke5
        • 2.Bd6#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Bxd3!
    • 1.Bf6+?
      • 1...Sd4
        • 2.Qxd4#
      • 1...Bxd3!
    • 1.Bg7+?
      • 1...Sd4
        • 2.Qxd4#
      • 1...Bxd3!
    • 1.Bh8+?
      • 1...Sd4
        • 2.Qxd4#
      • 1...Bxd3!
    • 1.Rh5+?
      • 1...g5
        • 2.Rxg5#
      • 1...gxh5!
    • 1.Qf5+?
      • 1...Kxd4
        • 2.Bf3#
      • 1...gxf5!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qe5#
      • 1...Kxd4
        • 2.Bf3#
      • 1...Ke4
        • 2.Be6#
      • 1...Sxd4
        • 2.Sf6#
      • 1...Qe4
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR1(B),XS(c)
      • Refutation
        • B(a);XQ(B)
    • Try
      • B(C);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR1(B),XS(c)
      • Refutation
        • B(a);XQ(B)
    • Try
      • B(C);CHECK,XP(d)
      • Vars
        • K(h);P-FLIGHT::B(C)
        • S(c);N_GUARD,P_SPINS(c)::QAR1(B),XS(c)
      • Refutation
        • B(a);XQ(B)
    • Try
      • B(C);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR1(B),XS(c)
      • Refutation
        • B(a);XQ(B)
    • Try
      • B(C);CHECK,XR(g)
      • Vars
        • K(h);OGATE,P-FLIGHT,XB(C)::QAB1(B)
        • K(h);P-FLIGHT::B(C)
        • S(c);N_GUARD,P_SPINS(c)::QAR1(B),XS(c)
      • Refutation
        • B(a);XQ(B)
    • Try
      • B(C);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR1(B),XS(c)
      • Refutation
        • B(a);XQ(B)
    • Try
      • B(C);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR1(B),XS(c)
      • Refutation
        • B(a);XQ(B)
    • Try
      • B(C);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR1(B),XS(c)
      • Refutation
        • B(a);XQ(B)
    • Try
      • R(E);CHECK
      • Vars
        • P(i);P_SPINP(i)::R(E),XP(i)
      • Refutation
        • P(i);XR(E)
    • Try
      • Q(B);CHECK
      • Vars
        • K(h);P-FLIGHT,XB(C)::R(E)+B(D)
      • Refutation
        • P(i);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • K(h);P-FLIGHT,XB(C)::R(E)+B(D)
      • K(h);S_FLIGHT::R(E)+B(D)
      • S(c);SBLOCK,XB(C)::S(G)
      • Q(b);SBLOCK::QAR1(B)
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