MESON Chess Problem Database

Problem Display
PID: 77238 (3n2Q1/8/3prp2/NN1k1P2/3P1P2/5K2/8/8 w - - 0 1)

Pape, Edouard

1st HM., Magyar Sakkvilag, 1949

3n2Q1/8/3prp2/NN1k1P2/3P1P2/5K2/8/8

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Qxe6#
    • 1...Sb7
      • 2.Qxe6#
    • 1...Sf7
      • 2.Qa8#
  • Tries
    • 1.Kf2?
      • 1...Sc6
        • 2.Qxe6#
      • 1...Sb7
        • 2.Qxe6#
      • 1...Sf7
        • 2.Qa8#
      • 1...Ke4!
    • 1.Kg2?
      • 1...Sc6
        • 2.Qxe6#
      • 1...Sb7
        • 2.Qxe6#
      • 1...Sf7
        • 2.Qa8#
      • 1...Ke4!
    • 1.Kg3?
      • 1...Sc6
        • 2.Qxe6#
      • 1...Sb7
        • 2.Qxe6#
      • 1...Sf7
        • 2.Qa8#
      • 1...Ke4!
    • 1.Kg4?
      • 1...Sc6
        • 2.Qxe6#
      • 1...Sb7
        • 2.Qxe6#
      • 1...Sf7
        • 2.Qa8#
      • 1...Ke4!
    • 1.Qf7?
      • 1...Sc6
        • 2.Qxe6#
      • 1...Sb7
        • 2.Qxe6#
        • 2.Qxb7#
      • 1...Sxf7!
    • 1.Qg1?
      • threat
        • 2.Sc3#
        • 2.Sc7#
      • 1...Re7
        • 2.Sc3#
      • 1...Re3+!
    • 1.Qxd8?
      • threat
        • 2.Qa8#
      • 1...Re7
        • 2.Qxd6#
      • 1...Re8
        • 2.Qxd6#
      • 1...Re3+!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Qa2#
      • 1...Re3+
        • 2.Kxe3#
      • 1...Re2
        • 2.Kxe2#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • S(e);N_GUARD::QAB1(G),XR(c)
    • S(e);N_SPINR(c),OGATE::QAB(G)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • S(e);N_GUARD::QAB1(G),XR(c)
        • S(e);N_SPINR(c),OGATE::QAB(G)
      • Refutation
        • K(a);N_SPINR(c),S_FLIGHT
    • Try
      • K(A);S_FLIGHT
      • Vars
        • S(e);N_GUARD::QAB1(G),XR(c)
        • S(e);N_SPINR(c),OGATE::QAB(G)
      • Refutation
        • K(a);N_SPINR(c),S_FLIGHT
    • Try
      • K(A);P-FLIGHT
      • Vars
        • S(e);N_GUARD::QAB1(G),XR(c)
        • S(e);N_SPINR(c),OGATE::QAB(G)
      • Refutation
        • K(a);N_SPINR(c),S_FLIGHT
    • Try
      • K(A);S_FLIGHT
      • Vars
        • S(e);N_GUARD::QAB1(G),XR(c)
        • S(e);N_SPINR(c),OGATE::QAB(G)
      • Refutation
        • K(a);N_SPINR(c),S_FLIGHT
    • Try
      • Q(G);
      • Vars
        • S(e);N_GUARD::QAB1(G),XR(c)
      • Refutation
        • S(e);N_SPINR(c),XQ(G)
    • Try
      • Q(G);N_PINR(c)
      • Threat
        • DUALS(2)
      • Vars
        • R(c);::S(E)
      • Refutation
        • R(c);CHECK
    • Try
      • Q(G);N_PINR(c),P_PINP(b),XS(e)
      • Threat
        • QAB(G)
      • Vars
        • R(c);N_GUARD::QAR1(G),XP(b)
      • Refutation
        • R(c);CHECK
  • Actual
    • Q(G);N_PINR(c)
    • Threat
      • QAB(G)
    • Vars
      • R(c);CHECK::QAB(G)+K(A),XR(c)
      • R(c);::QAB(G)+K(A),XR(c)
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