MESON Chess Problem Database

Problem Display
PID: 257772 (8/6p1/1Q4R1/8/8/KR3n2/8/k2r4 w - - 0 1)

Shmatov, Vladimir Afanasievich

Zadachi i Etyudi, 2007

8/6p1/1Q4R1/8/8/KR3n2/8/k2r4

#2

4 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Rxb1#
    • 1...Rd2
      • 2.Rb1#
    • 1...Rd4
      • 2.Rb1#
    • 1...Rd5
      • 2.Rb1#
    • 1...Rd6
      • 2.Rb1#
    • 1...Rd7
      • 2.Rb1#
    • 1...Rd8
      • 2.Rb1#
    • 1...Sd2
      • 2.Qd4#
  • Tries
    • 1.Rb2?
      • threat
        • 2.Ra2#
      • 1...Rd2
        • 2.Rb1#
      • 1...Rd3+!
    • 1.Rc3?
      • threat
        • 2.Qb2#
      • 1...Rd2
        • 2.Rc1#
      • 1...Rb1!
    • 1.Qf2?
      • threat
        • 2.Qa2#
        • 2.Qb2#
      • 1...Rb1
        • 2.Qa2#
      • 1...Sd2
        • 2.Qd4#
      • 1...Rd2!
    • 1.Qa5?
      • threat
        • 2.Kb4#
        • 2.Qc3#
      • 1...Rc1
        • 2.Kb4#
      • 1...Rb1
        • 2.Kb4#
      • 1...Rd3
        • 2.Kb4#
      • 1...Rd4
        • 2.Qc3#
      • 1...Rd5
        • 2.Qc3#
      • 1...Rd2!
    • 1.Qc5?
      • threat
        • 2.Qc3#
      • 1...Rc1
        • 2.Qxc1#
      • 1...Rd2
        • 2.Qc1#
      • 1...Rd3
        • 2.Qc1#
      • 1...Rb1!
    • 1.Qc7?
      • threat
        • 2.Qc3#
      • 1...Rc1
        • 2.Qxc1#
      • 1...Rd2
        • 2.Qc1#
      • 1...Rd3
        • 2.Qc1#
      • 1...Rb1!
    • 1.Qc6?
      • threat
        • 2.Qc3#
      • 1...Rc1
        • 2.Qxc1#
      • 1...Rd2
        • 2.Qc1#
      • 1...Rd3
        • 2.Qc1#
      • 1...Rb1!
  • Keys
    • 1.Rg2!
      • threat
        • 2.Ra2#
      • 1...Rd2
        • 2.Rb1#
      • 1...Sd2
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 6
  • Sets
    • R(b);N_GUARD::R1(B),XR(b)
    • R(b);N_GUARD::R1(B)
    • S(c);N_GUARD,S_CUTR(b)::QAB(C)
  • Tries
    • Try
      • R(B);
      • Threat
        • R1(B)
      • Vars
        • R(b);N_GUARD::R1(B)
      • Refutation
        • R(b);CHECK
    • Try
      • R(B);
      • Threat
        • QAB1(C)
      • Vars
        • R(b);N_GUARD::R(B)
      • Refutation
        • R(b);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);::QAR1(C)
        • S(c);N_GUARD,S_CUTR(b)::QAB(C)
      • Refutation
        • R(b);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);::QAR(C)+K(A)
        • R(b);P_PINR(B)::QAR(C)+K(A)
        • R(b);::QAB(C)
      • Refutation
        • R(b);
    • Try
      • Q(C);
      • Threat
        • QAB(C)
      • Vars
        • R(b);N_GUARD::QAR2(C),XR(b)
        • R(b);N_GUARD::QAR2(C)
        • R(b);N_GUARD,P_PINR(B)::QAR2(C)
      • Refutation
        • R(b);
    • Try
      • Q(C);
      • Threat
        • QAB(C)
      • Vars
        • R(b);N_GUARD::QAR2(C),XR(b)
        • R(b);N_GUARD::QAR2(C)
        • R(b);N_GUARD,P_PINR(B)::QAR2(C)
      • Refutation
        • R(b);
    • Try
      • Q(C);
      • Threat
        • QAB(C)
      • Vars
        • R(b);N_GUARD::QAR2(C),XR(b)
        • R(b);N_GUARD::QAR2(C)
        • R(b);N_GUARD,P_PINR(B)::QAR2(C)
      • Refutation
        • R(b);
  • Actual
    • R(D);
    • Threat
      • R1(D)
    • Vars
      • R(b);N_GUARD::R1(B)
      • S(c);N_GUARD,S_CUTR(b)::QAB(C)
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