MESON Chess Problem Database

Problem Display
PID: 264096 (7Q/3p4/K3pp2/6NR/1PNk1n1R/pPppr3/2P2n1b/4qrBB w - - 0 1)

Felkai, Imre

Tijdschrift vd KNSB, 1940

7Q/3p4/K3pp2/6NR/1PNk1n1R/pPppr3/2P2n1b/4qrBB

#2

11 + 13

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Sf3#
  • Tries
    • 1.Sf3+?
      • 1...Ke4
        • 2.Sd6#
      • 1...Rxf3!
    • 1.Sxe6+?
      • 1...dxe6
        • 2.Qd8#
      • 1...Rxe6+!
    • 1.Qxf6+?
      • 1...e5
        • 2.Qb6#
        • 2.Qd6#
      • 1...Re5!
    • 1.Qa8?
      • threat
        • 2.Qa7#
      • 1...Sxh1
        • 2.Qe4#
      • 1...Re5
        • 2.Sf3#
      • 1...Rf3
        • 2.Sxf3#
      • 1...Re4
        • 2.Sf3#
      • 1...Se4
        • 2.Qxe4#
      • 1...dxc2!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Qxd7#
      • 1...Re4
        • 2.Sf3#
      • 1...Se4
        • 2.Qxe4#
      • 1...Re5
        • 2.Qxd3#
      • 1...Sg4
        • 2.Qe4#
      • 1...d5
        • 2.Qa7#
      • 1...d6
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(h);N_GUARD,N_SPINS(j),P_SPINS(c),SBLOCK::S(H)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(i);N_SPINP(l),P-FLIGHT,S_CUTR(h)::S(F)
      • Refutation
        • R(h);N_SPINS(j),P_SPINS(c),XS(H)
    • Try
      • S(H);CHECK,XP(k)
      • Vars
        • P(m);S_CUTR(h),XS(H)::QAR(K)
      • Refutation
        • R(h);CHECK,N_SPINS(j),P_SPINS(c),XS(H)
    • Try
      • Q(K);CHECK,XP(l)
      • Refutation
        • R(h);N_SPINS(j),P_SPINR(h),P_SPINS(c)
    • Try
      • Q(K);N_PINP(l)
      • Threat
        • QAB(K)
      • Vars
        • S(c);N_GUARD,P_SPINR(h),XB(B)::QAR1(K)
        • R(h);N_GUARD,N_SPINS(j),P_SPINS(c)::S(H)
        • R(h);N_GUARD,N_SPINS(j),P_SPINS(c)::S(H),XR(h)
        • S(c);N_GUARD,N_SPINS(j),P_SPINR(h)::QAR1(K),XS(c)
      • Refutation
        • P(g);XP(C)
  • Actual
    • Q(K);N_PINP(l)
    • Threat
      • QAR(K),XP(m)
    • Vars
      • R(h);N_GUARD,N_SPINS(j),P_SPINS(c)::S(H)
      • S(c);N_GUARD,N_SPINS(j),P_SPINR(h)::QAR1(K),XS(c)
      • R(h);N_GUARD,N_SPINS(j),P_SPINS(c)::QAR1(K),XP(g)
      • S(c);N_GUARD,N_SPINS(j),P_SPINR(h)::QAR1(K)
      • P(m);OGATE::QAB(K)
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