MESON Chess Problem Database

Problem Display
PID: 91101 (3Q4/r2p1PK1/2P1k1p1/1nP3r1/1R4Pb/1N1N1b2/4n2B/1B3q2 w - - 0 1)

Paros, Gyorgy

Die Schwalbe, 1939

3Q4/r2p1PK1/2P1k1p1/1nP3r1/1R4Pb/1N1N1b2/4n2B/1B3q2

#2

11 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.f8S#
    • 1...Ra1
      • 2.Qxd7#
    • 1...Ra2
      • 2.Qxd7#
    • 1...Ra3
      • 2.Qxd7#
    • 1...Ra4
      • 2.Qxd7#
    • 1...Ra5
      • 2.Qxd7#
    • 1...Ra6
      • 2.Qxd7#
    • 1...Ra8
      • 2.Qxd7#
    • 1...Bd5
      • 2.Qe8#
    • 1...Sc7
      • 2.Qxd7#
    • 1...d5
      • 2.Qf6#
  • Tries
    • 1.Sf4+?
      • 1...Ke5
        • 2.Qf6#
        • 2.Qe7#
        • 2.Qe8#
      • 1...Sxf4!
    • 1.Re4+?
      • 1...Kd5
        • 2.Sb4#
      • 1...Re5
        • 2.Rxe5#
      • 1...Bxe4!
  • Keys
    • 1.Ba2!
      • threat
        • 2.Sd4#
      • 1...Kd5
        • 2.Sa5#
      • 1...Rxa2
        • 2.Qxd7#
      • 1...Rd5
        • 2.f8S#
      • 1...Bd5
        • 2.Qe8#
      • 1...Sed4
        • 2.Sxd4#
      • 1...Sbd4
        • 2.Sxd4#
      • 1...d5
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • R(f);SBLOCK::P=S
    • R(i);N_GUARD::QAB1(K),XP(j)
    • B(c);SBLOCK::QAR2(K)
    • S(e);S_CUTR(i)::QAB1(K),XP(j)
    • P(j);P_PINP(I),SBLOCK::QAR1(K)
  • Tries
    • Try
      • S(D);CHECK
      • Refutation
        • S(b);XS(D)
    • Try
      • R(E);CHECK
      • Vars
        • K(g);P_SPINP(j),S_FLIGHT::S(D)
        • R(f);N_GUARD,P_SPINR(f)::R1(E),XR(f)
      • Refutation
        • B(c);XR(E)
  • Actual
    • B(A);
    • Threat
      • B(A)+S(C),DCHECK
    • Vars
      • K(g);P_SPINP(j),S_FLIGHT::B(A)+S(C)
      • R(i);N_GUARD,XB(A)::QAB1(K),XP(j)
      • R(f);SBLOCK::P=S
      • B(c);SBLOCK::QAR2(K)
      • S(b);::B(A)+S(C),DCHECK,XS(b)
      • S(e);::B(A)+S(C),DCHECK,XS(e)
      • P(j);P_PINP(I),SBLOCK::QAR1(K)
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