MESON Chess Problem Database

Problem Display
PID: 106503 (K7/4RN2/2P2k2/5NR1/5PP1/8/6br/6rQ w - - 0 1)

Bosak, Juraj

Praca, 1952

K7/4RN2/2P2k2/5NR1/5PP1/8/6br/6rQ

#2

9 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1+
      • 2.Qxa1#
    • 1...Rh6
      • 2.Qxh6#
    • 1...Rh8+
      • 2.Qxh8#
    • 1...Bxc6+
      • 2.Qxc6#
  • Tries
    • 1.Se5?
      • threat
        • 2.Sd7#
        • 2.Rg6#
      • 1...Rh8+
        • 2.Qxh8#
      • 1...Bxc6+
        • 2.Qxc6#
      • 1...Rd1
        • 2.Rg6#
      • 1...Rh6
        • 2.Sd7#
        • 2.Qxh6#
      • 1...Ra1+!
    • 1.S7d6?
      • threat
        • 2.Se8#
      • 1...Ra1+
        • 2.Qxa1#
      • 1...Rh8+
        • 2.Qxh8#
      • 1...Bxc6+!
    • 1.S7h6?
      • threat
        • 2.Sg8#
      • 1...Ra1+
        • 2.Qxa1#
      • 1...Bxc6+
        • 2.Qxc6#
      • 1...Rxh6
        • 2.Qxh6#
      • 1...Bd5!
    • 1.Sd8?
      • threat
        • 2.Re6#
        • 2.Rf7#
      • 1...Ra1+
        • 2.Qxa1#
      • 1...Bxc6+
        • 2.Qxc6#
      • 1...Re1
        • 2.Rf7#
      • 1...Rh7
        • 2.Re6#
      • 1...Bd5!
  • Keys
    • 1.Sh8!
      • threat
        • 2.Rg6#
      • 1...Ra1+
        • 2.Qxa1#
      • 1...Rxh8+
        • 2.Qxh8#
      • 1...Bxc6+
        • 2.Qxc6#
      • 1...Rh6
        • 2.Qxh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • R(a);CHECK,OGATE::QAB(A),XR(a)
    • R(c);OGATE::QAR2(A),XR(c)
    • R(c);CHECK,OGATE::QAB(A),XR(c)
    • B(b);CHECK,OGATE,XP(F)::QAR(A),XB(b)
  • Tries
    • Try
      • S(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);CHECK,OGATE::QAB(A),XR(c)
        • B(b);CHECK,OGATE,XP(F)::QAR(A),XB(b)
        • R(a);::R1(E)
      • Refutation
        • R(a);CHECK
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • R(a);CHECK,OGATE::QAB(A),XR(a)
        • R(c);CHECK,OGATE::QAB(A),XR(c)
      • Refutation
        • B(b);CHECK,XP(F)
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • R(a);CHECK,OGATE::QAB(A),XR(a)
        • B(b);CHECK,OGATE,XP(F)::QAR(A),XB(b)
        • R(c);OGATE,XS(H)::QAR2(A),XR(c)
      • Refutation
        • B(b);
    • Try
      • S(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);CHECK,OGATE::QAB(A),XR(a)
        • B(b);CHECK,OGATE,XP(F)::QAR(A),XB(b)
        • R(a);::R1(G)
        • R(c);::R1(G)
      • Refutation
        • B(b);
  • Actual
    • S(H);
    • Threat
      • R1(E)
    • Vars
      • R(a);CHECK,OGATE::QAB(A),XR(a)
      • R(c);CHECK,OGATE,XS(H)::QAB(A),XR(c)
      • B(b);CHECK,OGATE,XP(F)::QAR(A),XB(b)
      • R(c);OGATE::QAR2(A),XR(c)
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