MESON Chess Problem Database

Problem Display
PID: 85101 (8/5p2/2Q2P2/3r4/4kP2/1p2P1Rp/1p1B3P/bK2R3 w - - 0 1)

Makaronets, Leonid

4th Prize, Breyer MT, 1973

8/5p2/2Q2P2/3r4/4kP2/1p2P1Rp/1p1B3P/bK2R3

#2

9 + 7

6490 yacpdb 2009
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Qxd5#
    • 1...Kf5
      • 2.e4#
  • Tries
    • 1.Bb4?
      • 1...Kd3
        • 2.Qxd5#
      • 1...Kf5!
    • 1.Ba5?
      • 1...Kd3
        • 2.Qxd5#
      • 1...Kf5!
    • 1.Re2?
      • 1...Kf5
        • 2.e4#
      • 1...Kd3!
    • 1.Rgg1?
      • 1...Kd3
        • 2.Qxd5#
      • 1...Kf5
        • 2.e4#
      • 1...Kf3!
    • 1.Rg2?
      • 1...Kd3
        • 2.Qxd5#
      • 1...Kf3
        • 2.Qxd5#
      • 1...Kf5
        • 2.e4#
      • 1...hxg2!
    • 1.Rxh3?
      • 1...Kd3
        • 2.Qxd5#
      • 1...Kf5!
    • 1.Rg5?
      • threat
        • 2.Qxd5#
      • 1...Kd3
        • 2.Qxd5#
      • 1...Kf3!
    • 1.Rg7?
      • 1...Kd3
        • 2.Qxd5#
      • 1...Kf5
        • 2.e4#
      • 1...Kf3!
    • 1.Rg8?
      • 1...Kd3
        • 2.Qxd5#
      • 1...Kf5
        • 2.e4#
      • 1...Kf3!
    • 1.Qb7?
      • 1...Kd3
        • 2.Qxd5#
      • 1...Kf5!
    • 1.Qa8?
      • 1...Kd3
        • 2.Qxd5#
      • 1...Kf5!
  • Keys
    • 1.Bc3!
      • 1...Kd3
        • 2.e4#
      • 1...Kf5
        • 2.Qxd5#

Anticipated by 812(1964)

This anticipates 176630(1979)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(e);N_SPINR(f),S_FLIGHT::QAR2(H),XR(f)
    • K(e);N_SPINR(f),OGATE,S_FLIGHT::P(E)
  • Tries
    • Try
      • B(C);
      • Vars
        • K(e);N_SPINR(f),S_FLIGHT::QAR2(H),XR(f)
      • Refutation
        • K(e);N_SPINR(f),S_FLIGHT
    • Try
      • B(C);
      • Vars
        • K(e);N_SPINR(f),S_FLIGHT::QAR2(H),XR(f)
      • Refutation
        • K(e);N_SPINR(f),S_FLIGHT
    • Try
      • R(B);
      • Vars
        • K(e);N_SPINR(f),OGATE,S_FLIGHT::P(E)
      • Refutation
        • K(e);N_SPINR(f),S_FLIGHT
    • Try
      • R(F);
      • Vars
        • K(e);N_SPINR(f),S_FLIGHT::QAR2(H),XR(f)
        • K(e);N_SPINR(f),OGATE,S_FLIGHT::P(E)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • R(F);
      • Vars
        • K(e);N_SPINR(f),S_FLIGHT::QAR2(H),XR(f)
        • K(e);S_FLIGHT::QAB(H),XR(f)
        • K(e);N_SPINR(f),OGATE,S_FLIGHT::P(E)
      • Refutation
        • P(d);XR(F)
    • Try
      • R(F);XP(d)
      • Vars
        • K(e);N_SPINR(f),S_FLIGHT::QAR2(H),XR(f)
      • Refutation
        • K(e);N_SPINR(f),S_FLIGHT
    • Try
      • R(F);
      • Threat
        • QAB1(H),XR(f)
      • Vars
        • K(e);N_SPINR(f),S_FLIGHT::QAR2(H),XR(f)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • R(F);
      • Vars
        • K(e);N_SPINR(f),S_FLIGHT::QAR2(H),XR(f)
        • K(e);N_SPINR(f),OGATE,S_FLIGHT::P(E)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • R(F);
      • Vars
        • K(e);N_SPINR(f),S_FLIGHT::QAR2(H),XR(f)
        • K(e);N_SPINR(f),OGATE,S_FLIGHT::P(E)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(H);
      • Vars
        • K(e);N_SPINR(f),S_FLIGHT::QAR2(H),XR(f)
      • Refutation
        • K(e);N_SPINR(f),S_FLIGHT
    • Try
      • Q(H);
      • Vars
        • K(e);N_SPINR(f),S_FLIGHT::QAR2(H),XR(f)
      • Refutation
        • K(e);N_SPINR(f),S_FLIGHT
  • Actual
    • B(C);
    • Vars
      • K(e);N_SPINR(f),OGATE,S_FLIGHT::R(F)+P(E)
      • K(e);N_SPINR(f),S_FLIGHT::QAR2(H),XR(f)
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