MESON Chess Problem Database

Problem Display
PID: 166197 (3Q2N1/K3Pr2/1n1Pk1P1/2P4R/8/8/8/8 w - - 0 1)

Mortensen, Jan Robert (aka 'Adamas')

Stella Polaris, 1966

3Q2N1/K3Pr2/1n1Pk1P1/2P4R/8/8/8/8

#2

8 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.e8Q#
      • 2.e8R#
    • 1...Rf2
      • 2.e8Q#
      • 2.e8R#
    • 1...Rf3
      • 2.e8Q#
      • 2.e8R#
    • 1...Rf4
      • 2.e8Q#
      • 2.e8R#
    • 1...Rf6
      • 2.e8Q#
      • 2.e8R#
    • 1...Rxe7+
      • 2.Qxe7#
    • 1...Rf8
      • 2.exf8S#
    • 1...Sa4
      • 2.Qc8#
    • 1...Sc4
      • 2.Qc8#
    • 1...Sd5
      • 2.Qc8#
    • 1...Sa8
      • 2.Qc8#
    • 1...Sc8+
      • 2.Qxc8#
  • Tries
    • 1.Kxb6?
      • threat
        • 2.Qc8#
      • 1...Rxe7
        • 2.Qxe7#
      • 1...Rf8
        • 2.exf8S#
      • 1...Rf5!
  • Keys
    • 1.Qf8!
      • 1...Rxe7+
        • 2.Qxe7#
      • 1...Sc8+
        • 2.Qxc8#
      • 1...Kd7
        • 2.e8Q#
      • 1...Rxf8
        • 2.exf8S#
      • 1...Rf5
        • 2.Qxf5#
      • 1...Rg7
        • 2.Qf5#
      • 1...Rf1
        • 2.e8Q#
      • 1...Rf2
        • 2.e8Q#
      • 1...Rf3
        • 2.e8Q#
      • 1...Rf4
        • 2.e8Q#
      • 1...Rf6
        • 2.e8Q#
      • 1...Rh7
        • 2.Qf5#
      • 1...Sa4
        • 2.Qc8#
      • 1...Sc4
        • 2.Qc8#
      • 1...Sd5
        • 2.Qc8#
      • 1...Sd7
        • 2.Qxf7#
      • 1...Sa8
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • R(c);N_PINP(F)::P=Q
    • R(c);CHECK,OGATE,XP(F)::QAR1(G),XR(c)
    • R(c);N_PINP(F)::PXR(c)=S
    • S(a);N_GUARD::QAB(G)
    • S(a);CHECK,N_GUARD::QAB(G),XS(a)
  • Tries
    • Try
      • K(E);N_SPINP(F),S_FLIGHT,XS(a)
      • Threat
        • QAB(G)
      • Vars
        • R(c);OGATE,XP(F)::QAR1(G),XR(c)
        • R(c);OGATE::PXR(c)=S
      • Refutation
        • R(c);
  • Actual
    • Q(G);
    • Vars
      • R(c);CHECK,OGATE,XP(F)::QAR1(G),XR(c)
      • S(a);CHECK,N_GUARD::QAB(G),XS(a)
      • K(b);N_PINP(F),S_FLIGHT::P=Q
      • R(c);N_PINP(F),XQ(G)::PXR(c)=S
      • R(c);N_PINP(F),OGATE::QAB1(G),XR(c)
      • R(c);OGATE::QAB1(G)
      • R(c);N_PINP(F)::P=Q
      • S(a);N_GUARD::QAB(G)
      • S(a);N_PINP(F),SBLOCK::QAB1(G),XR(c)
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