MESON Chess Problem Database

Problem Display
PID: 83964 (1nr5/R2pPp2/P2kPK2/pP1P1pp1/1p1Q4/2r5/8/2R5 w - - 0 1)

Csak, Janos

Magyar Sakkelet, 1982

1nr5/R2pPp2/P2kPK2/pP1P1pp1/1p1Q4/2r5/8/2R5

#2

9 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Qe5#
    • 1...Rb3
      • 2.Qe5#
    • 1...Rd3
      • 2.Qe5#
    • 1...Rf3
      • 2.Qe5#
    • 1...Rg3
      • 2.Qe5#
    • 1...Rh3
      • 2.Qe5#
    • 1...R3c5
      • 2.Qe5#
    • 1...R3c6
      • 2.Qe5#
      • 2.dxc6#
    • 1...R3c7
      • 2.Qe5#
    • 1...Rc4
      • 2.e8S#
    • 1...R8c5
      • 2.Qe5#
      • 2.e8S#
    • 1...R8c6
      • 2.dxc6#
      • 2.e8S#
    • 1...R8c7
      • 2.e8S#
    • 1...Rf8
      • 2.exf8Q#
      • 2.exf8B#
    • 1...Sxa6
      • 2.Rxd7#
    • 1...Sc6
      • 2.Rxd7#
      • 2.dxc6#
    • 1...dxe6
      • 2.dxe6#
    • 1...fxe6
      • 2.dxe6#
  • Tries
    • 1.Rxc3?
      • threat
        • 2.Qe5#
      • 1...Rxc3
        • 2.e8S#
      • 1...Rc4
        • 2.e8S#
      • 1...Sc6
        • 2.Rxd7#
        • 2.Qc5#
        • 2.dxc6#
      • 1...bxc3!
    • 1.e8Q?
      • threat
        • 2.Qe7#
      • 1...Sc6
        • 2.Rxd7#
        • 2.Qxd7#
        • 2.dxc6#
      • 1...Rxe8!
  • Keys
    • 1.Rc7!
      • threat
        • 2.Qe5#
      • 1...Kxc7
        • 2.d6#
      • 1...R8xc7
        • 2.e8S#
      • 1...Re3
        • 2.Qc5#
      • 1...Sc6
        • 2.Rxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 12
  • Sets
    • R(a);::QAB1(B)
    • R(j);N_GUARD::P=S
    • R(j);OGATE::PXR(j)=Q
    • S(i);N_GUARD,XP(E)::R1(H),XP(g)
    • P(g);OGATE,XP(F)::QAR(B)+P(D),XP(g)
    • P(h);OGATE,XP(F)::QAR(B)+P(D),XP(h)
  • Tries
    • Try
      • R(A);XR(a)
      • Threat
        • QAB1(B)
      • Vars
        • R(j);N_GUARD,XR(A)::P=S
        • R(j);N_GUARD::P=S
      • Refutation
        • P(b);XR(A)
    • Try
      • P(I);
      • Threat
        • QAB1(I)
      • Refutation
        • R(j);XQ(I)
  • Actual
    • R(H);
    • Threat
      • QAB1(B)
    • Vars
      • K(f);OGATE,P_SPINR(a),S_FLIGHT,XR(H)::P(D)
      • R(j);N_GUARD,XR(H)::P=S
      • R(a);N_GUARD::QAB1(B)
      • S(i);N_GUARD::R1(H),XP(g)
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