MESON Chess Problem Database

Problem Display
PID: 109544 (4BR1K/1p2P1pN/4k2p/4N1R1/1Q2P1P1/1n6/8/3rnr2 w - - 0 1)

Tura, Waldemar

Comm., Themes-64, 1959

4BR1K/1p2P1pN/4k2p/4N1R1/1Q2P1P1/1n6/8/3rnr2

#2

10 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Bd7#
    • 1...Rb1
      • 2.Bd7#
    • 1...Rc1
      • 2.Bd7#
    • 1...Rd7
      • 2.Bxd7#
    • 1...Rd8
      • 2.exd8S#
    • 1...Rg1
      • 2.Bf7#
    • 1...Rh1
      • 2.Bf7#
    • 1...Rf7
      • 2.Bxf7#
    • 1...Rxf8+
      • 2.exf8S#
    • 1...Sd3
      • 2.Bd7#
    • 1...Sf3
      • 2.Bf7#
    • 1...Sd2
      • 2.Bd7#
    • 1...Sd4
      • 2.Bd7#
  • Tries
    • 1.Sg6?
      • threat
        • 2.Re5#
      • 1...Rxf8+
        • 2.Sgxf8#
        • 2.exf8S#
      • 1...hxg5
        • 2.Sxg5#
      • 1...Rd5
        • 2.exd5#
      • 1...Rf5
        • 2.gxf5#
      • 1...Sd3
        • 2.Qb6#
      • 1...Sf3
        • 2.Sf4#
      • 1...Sc5!
    • 1.Rf6+?
      • 1...gxf6
        • 2.Sf8#
        • 2.Bf7#
      • 1...Rxf6!
    • 1.Qb6+?
      • 1...Kxe7
        • 2.Sg6#
      • 1...Rd6!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Re5#
      • 1...Rxf8+
        • 2.exf8S#
      • 1...hxg5
        • 2.Sxg5#
      • 1...Rd5
        • 2.exd5#
      • 1...Rf5
        • 2.gxf5#
      • 1...Sd3
        • 2.Qd6#
      • 1...Sf3
        • 2.Rg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 10
  • Sets
    • R(a);N_GUARD::B(H)
    • R(a);N_GUARD::B(H),XR(a)
    • R(a);OGATE::PXR(a)=S
    • R(c);N_GUARD::B(H)
    • R(c);N_GUARD::B(H),XR(c)
    • R(c);CHECK,OGATE,XR(I)::PXR(c)=S
    • S(b);S_CUTR(a)::B(H)
    • S(b);S_CUTR(c)::B(H)
    • S(d);S_CUTR(a)::B(H)
  • Tries
    • Try
      • S(D);
      • Threat
        • R1(E)
      • Vars
        • P(f);XR(E)::S(G),XP(f)
        • R(a);OGATE::P(B),XR(a)
        • R(c);OGATE::P(C),XR(c)
        • S(b);S_CUTR(a)::QAR(A)
        • S(b);S_CUTR(c)::S(D)
      • Refutation
        • S(d);
    • Try
      • R(I);CHECK
      • Refutation
        • R(c);XR(I)
    • Try
      • Q(A);CHECK
      • Vars
        • K(e);P-FLIGHT,XP(F)::S(D)
      • Refutation
        • R(a);P_SPINR(a)
  • Actual
    • S(D);
    • Threat
      • R1(E)
    • Vars
      • R(c);CHECK,OGATE,XR(I)::PXR(c)=S
      • P(f);XR(E)::S(G),XP(f)
      • R(a);OGATE::P(B),XR(a)
      • R(c);OGATE::P(C),XR(c)
      • S(b);S_CUTR(a)::QAR1(A)
      • S(b);S_CUTR(c)::R(E)
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