MESON Chess Problem Database

Problem Display
PID: 87723 (8/1B6/1N1b4/QnP1qR2/K2k3r/2pN2R1/n4P2/6B1 w - - 0 1)

Pieprzyk, Rudolf

Problemista, 1966

8/1B6/1N1b4/QnP1qR2/K2k3r/2pN2R1/n4P2/6B1

#2

10 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf6
      • 2.f4#
    • 1...Qg7
      • 2.f4#
    • 1...Qh8
      • 2.f4#
    • 1...Qxc5
      • 2.f4#
    • 1...Qxf5
      • 2.f4#
    • 1...Sc1
      • 2.Qb4#
    • 1...Sb4
      • 2.Qxb4#
  • Tries
    • 1.Rxe5?
      • threat
        • 2.f4#
      • 1...Rh1
        • 2.Re4#
      • 1...Rh2
        • 2.Re4#
      • 1...Re4
        • 2.Rxe4#
        • 2.Rd5#
      • 1...Rf4!
    • 1.f3+?
      • 1...Qe3
        • 2.Rd5#
      • 1...Kxd3+!
  • Keys
    • 1.Sc1!
      • threat
        • 2.Sb3#
      • 1...Kxc5+
        • 2.f4#
      • 1...Qxg3
        • 2.fxg3#
      • 1...Qxf5
        • 2.f4#
      • 1...Sxc1
        • 2.Qb4#
      • 1...Qd5
        • 2.f3#
      • 1...Qe3
        • 2.fxe3#
      • 1...Qe6
        • 2.Rd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • Q(f);N_GUARD::B(A)+P(B)
    • Q(f);N_GUARD,XP(G)::B(A)+P(B)
    • Q(f);N_GUARD,XR(H)::B(A)+P(B)
    • S(a);N_GUARD::QAR2(F)
    • S(a);N_GUARD::QAR2(F),XS(a)
  • Tries
    • Try
      • R(H);XQ(f)
      • Threat
        • B(A)+P(B)
      • Vars
        • R(d);N_GUARD::R1(H)
      • Refutation
        • R(d);
    • Try
      • P(B);CHECK
      • Vars
        • Q(f);OGATE,P_SPINQ(f)::R1(H)
      • Refutation
        • K(c);CHECK,P-FLIGHT,XS(C)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • K(c);CHECK,P_SPINQ(f),P_SPINS(e),S_FLIGHT,XP(G)::B(A)+P(B)
      • Q(f);OGATE,XR(D)::B(A)+P(B),XQ(f)
      • Q(f);N_GUARD,XR(H)::B(A)+P(B)
      • S(a);N_GUARD,XS(C)::QAR2(F)
      • Q(f);N_GUARD::B(A)+P(B)
      • Q(f);OGATE::P(B),XQ(f)
      • Q(f);::R1(D)
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