MESON Chess Problem Database

Problem Display
PID: 142592 (8/2pK3B/3pN3/3kp3/1p2R3/1Pp5/2bN2nn/3Q4 w - - 0 1)

Evdokimov, Valery Antolovich

Phenix, 1990

8/2pK3B/3pN3/3kp3/1p2R3/1Pp5/2bN2nn/3Q4

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Sxb1#
    • 1...Bxb3
      • 2.Sxb3#
      • 2.Qxb3#
    • 1...Bxe4
      • 2.Sxe4#
      • 2.Bxe4#
    • 1...c5
      • 2.Sc7#
  • Tries
    • 1.Sb1+?
      • 1...Bd3
        • 2.Qxd3#
      • 1...Bxd1!
    • 1.Sf1+?
      • 1...Bd3
        • 2.Qxd3#
      • 1...Bxd1!
    • 1.Sf3+?
      • 1...Bd3
        • 2.Qxd3#
      • 1...Bxd1!
    • 1.Sc4+?
      • 1...Bd3
        • 2.Qxd3#
      • 1...Bxd1!
    • 1.Qe2?
      • threat
        • 2.Qc4#
      • 1...Bxb3
        • 2.Qd3#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Se3!
    • 1.Qf3?
      • threat
        • 2.Rd4#
      • 1...Bxe4
        • 2.Bxe4#
        • 2.Qxe4#
      • 1...Sxf3!
    • 1.Qh5?
      • threat
        • 2.Rd4#
      • 1...Bxe4
        • 2.Bxe4#
      • 1...c5
        • 2.Sc7#
      • 1...Sf3!
    • 1.Qg1?
      • threat
        • 2.Sxc7#
      • 1...c5
        • 2.Sc7#
      • 1...c6
        • 2.Sc7#
      • 1...Se3!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Sxc7#
      • 1...e4
        • 2.Qh5#
      • 1...Bf5
        • 2.Se4#
      • 1...c5
        • 2.Sc7#
      • 1...c6
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD::QAR(A)+S(B),XB(a)
    • P(i);SBLOCK::S(E)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR2(A),XB(a)
      • Refutation
        • B(a);XQ(A)
    • Try
      • S(B);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR2(A),XB(a)
      • Refutation
        • B(a);XQ(A)
    • Try
      • S(B);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR2(A),XB(a)
      • Refutation
        • B(a);XQ(A)
    • Try
      • S(B);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR2(A),XB(a)
      • Refutation
        • B(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • B(a);N_GUARD,XP(C)::QAR2(A)
        • B(a);N_GUARD::QAR2(A),XB(a)
      • Refutation
        • S(b);
    • Try
      • Q(A);
      • Threat
        • QAB(A)+R(D),DCHECK
      • Refutation
        • S(c);XQ(A)
    • Try
      • Q(A);P_PINP(g)
      • Threat
        • R1(D)
      • Vars
        • B(a);OGATE,XR(D)::B(G),XB(a)
        • P(i);SBLOCK::S(E)
      • Refutation
        • S(c);
    • Try
      • Q(A);
      • Threat
        • S(E),XP(i)
      • Vars
        • P(i);::S(E)
      • Refutation
        • S(b);
  • Actual
    • R(D);
    • Threat
      • S(E),XP(i)
    • Vars
      • P(g);OGATEB::QAR(A)
      • B(a);N_GUARD,P_PINS(E)::QAR(A)+S(B)
      • P(i);::S(E)
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