MESON Chess Problem Database

Problem Display
PID: 155687 (2rRr2B/3P1n2/5b2/1p3P2/1P1k4/P1NNn2R/B4Q2/7K w - - 0 1)

Katko, J

3rd HM., Nederlandse Bond van Probleemvrienden, 1932

2rRr2B/3P1n2/5b2/1p3P2/1P1k4/P1NNn2R/B4Q2/7K

#2

12 + 7

1577 Jaarboek 1932

SOLUTION

  • SOUND
  • Tries
    • 1.Se2+?
      • 1...Ke4
        • 2.Rxe3#
      • 1...Kxd3!
    • 1.Sxb5+?
      • 1...Ke4
        • 2.Rxe3#
      • 1...Kxd3!
    • 1.Qxe3+?
      • 1...Kxc3
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Rxe3!
    • 1.dxc8Q+?
      • 1...Rxd8
        • 2.Qxe3#
      • 1...Sd6
        • 2.Rxd6#
      • 1...Sxd8!
    • 1.dxc8R+?
      • 1...Rxd8
        • 2.Qxe3#
      • 1...Sd6
        • 2.Rxd6#
      • 1...Sxd8!
  • Keys
    • 1.Se5!
      • threat
        • 2.Qxe3#
      • 1...Kxc3
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Kxe5
        • 2.dxe8Q#
        • 2.dxe8R#
      • 1...Rxc3
        • 2.Qf4#
      • 1...Rxe5
        • 2.Qd2#
      • 1...Bg5
        • 2.Qd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(b);N_SPINB(d),N_SPINS(a),P-FLIGHT::R1(G),XS(a)
      • Refutation
        • K(b);N_SPINB(d),P-FLIGHT,XS(F)
    • Try
      • S(E);CHECK,XP(c)
      • Vars
        • K(b);N_SPINB(d),N_SPINS(a),P-FLIGHT::R1(G),XS(a)
      • Refutation
        • K(b);N_SPINB(d),P-FLIGHT,XS(F)
    • Try
      • Q(C);CHECK,XS(a)
      • Vars
        • K(b);S_FLIGHT,XS(E)::PXR(f)=Q
      • Refutation
        • R(g);XQ(C)
    • Try
      • P(J);CHECK,XR(f)
      • Vars
        • R(g);XR(K)::QAB1(C),XS(a)
        • S(e);N_GUARD::R(K),XS(e)
      • Refutation
        • S(e);XR(K)
    • Try
      • P(J);CHECK,XR(f)
      • Vars
        • R(g);XR(K)::QAB1(C),XS(a)
        • S(e);N_GUARD::R(K),XS(e)
      • Refutation
        • S(e);XR(K)
  • Actual
    • S(F);N_PINB(d)
    • Threat
      • QAB1(C),XS(a)
    • Vars
      • K(b);S_FLIGHT,XS(E)::PXR(f)=Q
      • K(b);N_SPINS(a),P_SPINB(d),S_FLIGHT,XS(F)::PXR(g)=Q
      • R(f);SBLOCK,XS(E)::QAR2(C)
      • R(g);SBLOCK,XS(F)::QAR2(C)
      • B(d);::QAR2(C)
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