MESON Chess Problem Database

Problem Display
PID: 235087 (6B1/p4R2/2pp4/R2N4/2krp3/2N1Q3/2Kp2b1/2br2q1 w - - 0 1)

Shanshin, Valery Yurevich

64 Shakhmatnoe obozrenie, 2015

6B1/p4R2/2pp4/R2N4/2krp3/2N1Q3/2Kp2b1/2br2q1

#2

7 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Ra4#
    • 1...Rxd5
      • 2.Ra4#
    • 1...c5
      • 2.Ra4#
  • Tries
    • 1.Sa2?
      • threat
        • 2.Qb3#
        • 2.Qc3#
      • 1...Qxe3
        • 2.Sxe3#
      • 1...Rxd5
        • 2.Qc3#
      • 1...c5
        • 2.Qb3#
      • 1...Bb2
        • 2.Qb3#
      • 1...Rd3!
    • 1.Sxe4?
      • threat
        • 2.Sxd6#
        • 2.Qb3#
        • 2.Qc3#
      • 1...Qxe3
        • 2.Sxd6#
      • 1...Rxe4
        • 2.Qc3#
        • 2.Qd3#
      • 1...Rxd5
        • 2.Qc3#
      • 1...cxd5
        • 2.Qb3#
        • 2.Qc3#
      • 1...c5
        • 2.Qb3#
      • 1...Rd3
        • 2.Sxd6#
        • 2.Qxd3#
      • 1...Qh2
        • 2.Qb3#
        • 2.Qc3#
      • 1...Bb2
        • 2.Sxd6#
        • 2.Qb3#
      • 1...Ba3
        • 2.Qb3#
        • 2.Qc3#
      • 1...Bxe4+!
    • 1.Rc7?
      • threat
        • 2.Rxc6#
      • 1...Rxd5
        • 2.Ra4#
      • 1...c5
        • 2.Ra4#
      • 1...Ba3!
  • Keys
    • 1.Sb5!
      • threat
        • 2.Sxd6#
      • 1...Kc5
        • 2.Sa3#
      • 1...Kxd5
        • 2.Rf5#
      • 1...Rxd5
        • 2.Qc3#
      • 1...cxb5
        • 2.Rc7#
      • 1...cxd5
        • 2.Qc3#
      • 1...Qh2
        • 2.Qxd4#
      • 1...Ba3
        • 2.Sxa3#
      • 1...c5
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • R(g);::R(D)
    • R(g);XS(E)::R(D)
    • P(i);SBLOCK::R(D)
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);XQ(C)::S(E),XQ(c)
        • R(g);XS(E)::QAR1(C)
        • P(i);::QAB1(C)
        • B(a);::QAB1(C)
      • Refutation
        • R(g);
    • Try
      • S(B);XP(h)
      • Threat
        • DUALS(3)
      • Vars
        • Q(c);XQ(C)::S(B),XP(j)
        • R(g);XS(E)::QAR1(C)
        • P(i);::QAB1(C)
      • Refutation
        • B(e);CHECK,XS(B)
    • Try
      • R(F);P_PINP(i)
      • Threat
        • R(F),XP(i)
      • Vars
        • R(g);P_SPINR(g),XS(E)::R(D)
        • P(i);::R(D)
      • Refutation
        • B(a);
  • Actual
    • S(B);
    • Threat
      • S(B),XP(j)
    • Vars
      • K(f);P-FLIGHT,P_SPINR(g)::R(D)+S(B)
      • K(f);OGATEB,S_FLIGHT,XS(E)::B(G)+R(F),DCHECK
      • R(g);SBLOCK,XS(E)::QAR1(C)
      • P(i);OGATEB,XS(B)::R(F)
      • P(i);SBLOCK,XS(E)::QAR1(C)
      • Q(c);N_GUARD::QAR1(C),XR(g)
      • B(a);N_GUARD::S(B),XB(a)
      • P(i);SBLOCK::QAB1(C)
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