MESON Chess Problem Database

Problem Display
PID: 102953 (bb1n4/qn2p2P/r7/r7/2RB2N1/pRP4k/4BQ1P/6K1 w - - 0 1)

Marandiuk, Mikhail Nazarovich

Virtmanis, Andris

Shakhmaty, 1969

bb1n4/qn2p2P/r7/r7/2RB2N1/pRP4k/4BQ1P/6K1

#2

10 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Qg3#
    • 1...Rd6
      • 2.Qg3#
    • 1...Bxh2+
      • 2.Qxh2#
    • 1...Bg3
      • 2.Qxg3#
    • 1...Sd6
      • 2.Qg3#
    • 1...e5
      • 2.Qg3#
  • Tries
    • 1.Bb6?
      • threat
        • 2.Bf1#
      • 1...Bxh2+
        • 2.Qxh2#
      • 1...Bg3
        • 2.Qxg3#
      • 1...Sc5
        • 2.h8Q#
        • 2.h8R#
      • 1...Sd6
        • 2.Qg3#
      • 1...Bf4!
    • 1.Rc7?
      • threat
        • 2.Qg3#
        • 2.c4#
      • 1...Qxd4
        • 2.cxd4#
      • 1...Qb6
        • 2.Qg3#
      • 1...Rb5
        • 2.Qg3#
      • 1...Re5
        • 2.Qg3#
      • 1...Rf5
        • 2.Qg3#
      • 1...Rb6
        • 2.Qg3#
      • 1...Re6
        • 2.Qg3#
      • 1...Rf6
        • 2.Qg3#
      • 1...Sc5
        • 2.Qg3#
      • 1...Sd6
        • 2.Qg3#
      • 1...Bxc7!
    • 1.Qe3+?
      • 1...Bg3
        • 2.Qxg3#
      • 1...Kh4!
    • 1.Qf3+?
      • 1...Bg3
        • 2.Qxg3#
      • 1...Kh4!
    • 1.h8Q+?
      • 1...Rh5
        • 2.Qxh5#
      • 1...Rh6!
    • 1.h8R+?
      • 1...Rh5
        • 2.Rxh5#
      • 1...Rh6!
  • Keys
    • 1.Be5!
      • threat
        • 2.Bf1#
      • 1...Qxf2+
        • 2.Sxf2#
      • 1...Qd4
        • 2.cxd4#
      • 1...Sc5
        • 2.Qg3#
      • 1...Sd6
        • 2.h8Q#
        • 2.h8R#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • R(c);S_CUTB(i)::QAR1(C)
    • R(d);S_CUTB(i)::QAR1(C)
    • B(i);CHECK,OGATE,XP(D)::QAR1(C),XB(i)
    • B(i);N_GUARD::QAR1(C),XB(i)
    • S(f);S_CUTB(i)::QAR1(C)
    • P(g);S_CUTB(i)::QAR1(C)
  • Tries
    • Try
      • B(H);
      • Threat
        • B(B)
      • Vars
        • B(i);CHECK,OGATE,XP(D)::QAR1(C),XB(i)
        • B(i);N_GUARD::QAR1(C),XB(i)
        • S(f);S_CUTR(c)::P=Q
        • S(f);S_CUTB(i)::QAR1(C)
      • Refutation
        • B(i);
    • Try
      • R(G);
      • Threat
        • DUALS(2)
      • Vars
        • Q(e);OGATE,P_PINQ(C),XB(H)::R(E)+P(F),XQ(e)
        • Q(e);::QAR1(C)
        • R(c);::QAR1(C)
        • R(d);::QAR1(C)
        • S(f);::QAR1(C)
      • Refutation
        • B(i);XR(G)
    • Try
      • Q(C);CHECK
      • Vars
        • B(i);N_GUARD,P_SPINB(i)::QAR1(C),XB(i)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);CHECK,P_SPINB(H)
      • Vars
        • B(i);N_GUARD,P_SPINB(i)::QAR1(C),XB(i)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • P(J);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAR2(J),XR(c)
      • Refutation
        • R(d);P_SPINR(d)
    • Try
      • P(J);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::R(J),XR(c)
      • Refutation
        • R(d);P_SPINR(d)
  • Actual
    • B(H);P_SPINQ(C)
    • Threat
      • B(B)
    • Vars
      • Q(e);CHECK,XQ(C)::S(I),XQ(e)
      • Q(e);OGATE::R(E)+P(F),XQ(e)
      • S(f);N_PINQ(C)::QAR1(C)
      • S(f);S_CUTR(d)::P=Q
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