MESON Chess Problem Database

Problem Display
PID: 235083 (4R3/1r6/4N2p/1QPR1p2/4kN1K/6pp/b2P1pq1/2nB4 w - - 0 1)

Shanshin, Valery Yurevich

64 Shakhmatnoe obozrenie, 2014

4R3/1r6/4N2p/1QPR1p2/4kN1K/6pp/b2P1pq1/2nB4

#2

9 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Qc4#
    • 1...Bc4
      • 2.Qxc4#
    • 1...Se2
      • 2.Qxe2#
      • 2.Qd3#
    • 1...Sb3
      • 2.Qe2#
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
  • Tries
    • 1.Sd4+?
      • 1...Kxf4
        • 2.Rxf5#
      • 1...Re7!
    • 1.Sg7+?
      • 1...Kxf4
        • 2.Sh5#
        • 2.Rxf5#
      • 1...Re7!
    • 1.Sf8+?
      • 1...Kxf4
        • 2.Sg6#
      • 1...Re7!
    • 1.Bc2+?
      • 1...Sd3
        • 2.Qxd3#
      • 1...Kf3!
    • 1.Qa4+?
      • 1...Bc4
        • 2.Qxc4#
      • 1...Rb4!
    • 1.Qb4+?
      • 1...Bc4
        • 2.Qxc4#
      • 1...Rxb4!
    • 1.d3+?
      • 1...Sxd3
        • 2.Qxd3#
      • 1...Ke3!
    • 1.c6?
      • threat
        • 2.Rd4#
        • 2.Re5#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...Se2
        • 2.Qxe2#
        • 2.Qd3#
      • 1...Rd7
        • 2.Re5#
      • 1...Sb3
        • 2.Re5#
        • 2.Qe2#
        • 2.Qd3#
      • 1...Sd3
        • 2.Rd4#
        • 2.Qxd3#
      • 1...Rxb5!
  • Keys
    • 1.Se2!
      • threat
        • 2.Sc3#
      • 1...Kf3
        • 2.S6d4#
      • 1...Kxd5
        • 2.S6f4#
      • 1...Bxd5
        • 2.Sg5#
      • 1...Sxe2
        • 2.Qd3#
      • 1...Qf3
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • B(b);N_GUARD::QAR2(E)
    • B(b);N_GUARD::QAR2(E),XB(b)
    • S(a);N_GUARD::QAB1(E),XS(a)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(g);P-FLIGHT,XS(C)::R1(G),XP(h)
      • Refutation
        • R(j);P_SPINR(j)
    • Try
      • S(H);CHECK
      • Refutation
        • R(j);P_SPINR(j)
    • Try
      • S(H);CHECK
      • Vars
        • K(g);P-FLIGHT,XS(C)::S(H)
      • Refutation
        • R(j);P_SPINR(j)
    • Try
      • B(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(E),XS(a)
      • Refutation
        • K(g);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::QAR2(E),XB(b)
      • Refutation
        • R(j);P_SPINR(j)
    • Try
      • Q(E);CHECK
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::QAR2(E),XB(b)
      • Refutation
        • R(j);XQ(E)
    • Try
      • P(B);CHECK
      • Vars
        • S(a);OGATE,XP(B)::QAB1(E),XS(a)
      • Refutation
        • K(g);P-FLIGHT
    • Try
      • P(F);
      • Threat
        • DUALS(2)
      • Vars
        • B(b);OGATE,XR(G)::QAB1(E),XB(b)
        • R(j);::R1(G)
      • Refutation
        • R(j);XQ(E)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • K(g);S_FLIGHT::S(H)
      • K(g);S_FLIGHT,XR(G)::S(H)
      • B(b);SBLOCK,XR(G)::R(I)+S(H),DCHECK
      • S(a);N_GUARD,XS(C)::QAB1(E)
      • Q(d);SBLOCK::R(I)+S(H)
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