MESON Chess Problem Database

Problem Display
PID: 86819 (8/3P2KP/1N1pp1p1/4N1R1/2Qpk3/4PRp1/1n3p2/B2r1r2 w - - 0 1)

Shanshin, Valery Yurevich

Slesarenko, Anatoly Vasilevich

US Problem Bulletin, 1991

8/3P2KP/1N1pp1p1/4N1R1/2Qpk3/4PRp1/1n3p2/B2r1r2

#2

10 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa1
      • 2.Qxd4#
    • 1...Rb1
      • 2.Qxd4#
    • 1...Rc1
      • 2.Qxd4#
    • 1...Rde1
      • 2.Qxd4#
    • 1...Sd3
      • 2.Qxd4#
  • Tries
    • 1.Kf6?
      • threat
        • 2.Rg4#
      • 1...Sd3
        • 2.Qxd4#
      • 1...dxe5!
    • 1.Qxe6?
      • threat
        • 2.Rg4#
        • 2.Qg4#
        • 2.Qd5#
        • 2.Qxg6#
      • 1...dxe3
        • 2.Rg4#
        • 2.Qg4#
      • 1...Sd3
        • 2.Qd5#
        • 2.Qxg6#
      • 1...d5
        • 2.Rg4#
        • 2.Qg4#
        • 2.Qxd5#
        • 2.Qxg6#
      • 1...dxe5!
    • 1.exd4?
      • threat
        • 2.Rg4#
      • 1...Rxd4
        • 2.Qe2#
      • 1...Sd3
        • 2.d5#
      • 1...dxe5!
    • 1.h8Q?
      • threat
        • 2.Qh4#
      • 1...dxe5
        • 2.Qa8#
      • 1...Sd3
        • 2.Qxd4#
      • 1...Rh1!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Rf4#
      • 1...dxe3
        • 2.Qxe3#
      • 1...dxe5
        • 2.Rg4#
      • 1...Sd3
        • 2.exd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(a);N_GUARD,XB(A)::QAR1(D),XP(f)
    • R(a);N_GUARD::QAR1(D),XP(f)
    • S(c);S_CUTR(a)::QAR1(D),XP(f)
  • Tries
    • Try
      • K(I);S_FLIGHT
      • Threat
        • R(F)
      • Vars
        • S(c);S_CUTR(a)::QAR1(D),XP(f)
      • Refutation
        • P(h);XS(E)
    • Try
      • Q(D);N_PINP(f),XP(i)
      • Threat
        • DUALS(4)
      • Refutation
        • P(h);P_SPINP(h),XS(E)
    • Try
      • P(B);XP(f)
      • Threat
        • R(F)
      • Vars
        • R(a);P_SPINR(a),SBLOCK,XP(B)::QAR2(D)
        • S(c);N_GUARD,S_CUTR(a)::QAR(D)+P(B)
      • Refutation
        • P(h);XS(E)
    • Try
      • P(J);
      • Threat
        • QAR(J)
      • Vars
        • P(h);N_GUARD,XS(E)::QAB(J)
        • S(c);S_CUTR(a)::QAR1(D),XP(f)
      • Refutation
        • R(b);
  • Actual
    • Q(D);N_PINP(f)
    • Threat
      • R1(C)
    • Vars
      • P(f);OGATE,P_SPINP(f),XP(B)::QAR1(D),XP(f)
      • P(h);SBLOCK,XS(E)::R(F)
      • S(c);::QAR(D)+P(B),XP(f)
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